18912500790 has 32 divisors (see below), whose sum is σ = 46616761440. Its totient is φ = 4907026944.

The previous prime is 18912500767. The next prime is 18912500797. The reversal of 18912500790 is 9700521981.

It is a super-2 number, since 2×18912500790² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18912500797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8518035 + ... + 8520254.

It is an arithmetic number, because the mean of its divisors is an integer number (1456773795).

Almost surely, 2^18912500790 is an apocalyptic number.

18912500790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18912500790 is an abundant number, since it is smaller than the sum of its proper divisors (27704260650).

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

18912500790 is a wasteful number, since it uses less digits than its factorization.

18912500790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17038336.

The product of its (nonzero) digits is 45360, while the sum is 42.

The spelling of 18912500790 in words is "eighteen billion, nine hundred twelve million, five hundred thousand, seven hundred ninety".