18858947145480 has 384 divisors, whose sum is σ = 67550202720000. Its totient is φ = 4534821365760.

The previous prime is 18858947145473. The next prime is 18858947145503. The reversal of 18858947145480 is 8454174985881.

18858947145480 is a `hidden beast` number, since 1 + 8 + 8 + 5 + 8 + 9 + 4 + 71 + 4 + 548 + 0 = 666.

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 = 18858947145399 and 18858947145408.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 35958171 + ... + 36478869.

It is an arithmetic number, because the mean of its divisors is an integer number (175911986250).

Almost surely, 2^{18858947145480} is an apocalyptic number.

18858947145480 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 18858947145480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33775101360000).

18858947145480 is an abundant number, since it is smaller than the sum of its proper divisors (48691255574520).

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

18858947145480 is a wasteful number, since it uses less digits than its factorization.

18858947145480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520909 (or 520902 counting only the distinct ones).

The product of its (nonzero) digits is 412876800, while the sum is 72.

The spelling of 18858947145480 in words is "eighteen trillion, eight hundred fifty-eight billion, nine hundred forty-seven million, one hundred forty-five thousand, four hundred eighty".