18913253790 has 64 divisors (see below), whose sum is σ = 48494096640. Its totient is φ = 4706760960.

The previous prime is 18913253783. The next prime is 18913253833. The reversal of 18913253790 is 9735231981.

It is a super-2 number, since 2×18913253790² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209431 + ... + 285810.

It is an arithmetic number, because the mean of its divisors is an integer number (757720260).

Almost surely, 2^18913253790 is an apocalyptic number.

18913253790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18913253790 is an abundant number, since it is smaller than the sum of its proper divisors (29580842850).

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

18913253790 is a wasteful number, since it uses less digits than its factorization.

18913253790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495337.

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 18913253790 in words is "eighteen billion, nine hundred thirteen million, two hundred fifty-three thousand, seven hundred ninety".