18936651456990 has 32 divisors (see below), whose sum is σ = 50497737219360. Its totient is φ = 5049773721792.

The previous prime is 18936651456979. The next prime is 18936651457001. The reversal of 18936651456990 is 9965415663981.

18936651456990 is a `hidden beast` number, since 1 + 8 + 9 + 3 + 6 + 6 + 51 + 4 + 569 + 9 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (18936651456979) and next prime (18936651457001).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35067872799 + ... + 35067873338.

It is an arithmetic number, because the mean of its divisors is an integer number (1578054288105).

Almost surely, 2^{18936651456990} is an apocalyptic number.

18936651456990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18936651456990 is an abundant number, since it is smaller than the sum of its proper divisors (31561085762370).

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

18936651456990 is a wasteful number, since it uses less digits than its factorization.

18936651456990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70135746153 (or 70135746147 counting only the distinct ones).

The product of its (nonzero) digits is 377913600, while the sum is 72.

The spelling of 18936651456990 in words is "eighteen trillion, nine hundred thirty-six billion, six hundred fifty-one million, four hundred fifty-six thousand, nine hundred ninety".