18924574690 has 24 divisors (see below), whose sum is σ = 39625743132. Its totient is φ = 6488425440.

The previous prime is 18924574679. The next prime is 18924574703. The reversal of 18924574690 is 9647542981.

It can be written as a sum of positive squares in 2 ways, for example, as 18341014041 + 583560649 = 135429^2 + 24157^2 .

It is a super-2 number, since 2×18924574690² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19310301 + ... + 19311280.

Almost surely, 2^18924574690 is an apocalyptic number.

18924574690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18924574690 is an abundant number, since it is smaller than the sum of its proper divisors (20701168442).

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

18924574690 is a wasteful number, since it uses less digits than its factorization.

18924574690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38621602 (or 38621595 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 18924574690 in words is "eighteen billion, nine hundred twenty-four million, five hundred seventy-four thousand, six hundred ninety".