18926990928664 has 32 divisors (see below), whose sum is σ = 43677671375520. Its totient is φ = 7487600806656.

The previous prime is 18926990928569. The next prime is 18926990928667. The reversal of 18926990928664 is 46682909962981.

It is a super-2 number, since 2×18926990928664² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18926990928667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12999306229 + ... + 12999307684.

It is an arithmetic number, because the mean of its divisors is an integer number (1364927230485).

Almost surely, 2^{18926990928664} is an apocalyptic number.

18926990928664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18926990928664 is an abundant number, since it is smaller than the sum of its proper divisors (24750680446856).

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

18926990928664 is a wasteful number, since it uses less digits than its factorization.

18926990928664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25998613939 (or 25998613935 counting only the distinct ones).

The product of its (nonzero) digits is 1451188224, while the sum is 79.

The spelling of 18926990928664 in words is "eighteen trillion, nine hundred twenty-six billion, nine hundred ninety million, nine hundred twenty-eight thousand, six hundred sixty-four".