18650486400 has 768 divisors, whose sum is σ = 77784188160. Its totient is φ = 3822059520.

The previous prime is 18650486389. The next prime is 18650486473. The reversal of 18650486400 is 468405681.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 32322912 + ... + 32323488.

It is an arithmetic number, because the mean of its divisors is an integer number (101281495).

Almost surely, 2^18650486400 is an apocalyptic number.

18650486400 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 18650486400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38892094080).

18650486400 is an abundant number, since it is smaller than the sum of its proper divisors (59133701760).

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

18650486400 is a wasteful number, since it uses less digits than its factorization.

18650486400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661 (or 644 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 18650486400 in words is "eighteen billion, six hundred fifty million, four hundred eighty-six thousand, four hundred".