18857465844480 has 432 divisors, whose sum is σ = 67043764307520. Its totient is φ = 4890154401792.

The previous prime is 18857465844473. The next prime is 18857465844487. The reversal of 18857465844480 is 8444856475881.

18857465844480 is a `hidden beast` number, since 1 + 8 + 8 + 5 + 7 + 4 + 65 + 84 + 4 + 480 = 666.

It is an interprime number because it is at equal distance from previous prime (18857465844473) and next prime (18857465844487).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 18857465844399 and 18857465844408.

It is not an unprimeable number, because it can be changed into a prime (18857465844487) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 881879869 + ... + 881901251.

It is an arithmetic number, because the mean of its divisors is an integer number (155193898860).

Almost surely, 2^{18857465844480} is an apocalyptic number.

18857465844480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18857465844480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33521882153760).

18857465844480 is an abundant number, since it is smaller than the sum of its proper divisors (48186298463040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18857465844480 is a wasteful number, since it uses less digits than its factorization.

18857465844480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23516 (or 23499 counting only the distinct ones).

The product of its (nonzero) digits is 1101004800, while the sum is 72.

The spelling of 18857465844480 in words is "eighteen trillion, eight hundred fifty-seven billion, four hundred sixty-five million, eight hundred forty-four thousand, four hundred eighty".