18499857904 has 60 divisors (see below), whose sum is σ = 40876180632. Its totient is φ = 8043376000.

The previous prime is 18499857853. The next prime is 18499857907. The reversal of 18499857904 is 40975899481.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18499857907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6247 + ... + 192454.

Almost surely, 2^18499857904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18499857904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20438090316).

18499857904 is an abundant number, since it is smaller than the sum of its proper divisors (22376322728).

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

18499857904 is a wasteful number, since it uses less digits than its factorization.

18499857904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198766 (or 198737 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 64.

The spelling of 18499857904 in words is "eighteen billion, four hundred ninety-nine million, eight hundred fifty-seven thousand, nine hundred four".