18690338912 has 288 divisors, whose sum is σ = 46661832000. Its totient is φ = 7361722368.

The previous prime is 18690338881. The next prime is 18690338923. The reversal of 18690338912 is 21983309681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 210003764 + ... + 210003852.

It is an arithmetic number, because the mean of its divisors is an integer number (162020250).

Almost surely, 2^18690338912 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 18690338912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23330916000).

18690338912 is an abundant number, since it is smaller than the sum of its proper divisors (27971493088).

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

18690338912 is an equidigital number, since it uses as much as digits as its factorization.

18690338912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 50.

The spelling of 18690338912 in words is "eighteen billion, six hundred ninety million, three hundred thirty-eight thousand, nine hundred twelve".