20988557132974 has 24 divisors (see below), whose sum is σ = 33446797571520. Its totient is φ = 9876054541056.

The previous prime is 20988557132903. The next prime is 20988557132989. The reversal of 20988557132974 is 47923175588902.

It is a super-2 number, since 2×20988557132974² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (70) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4595722 + ... + 7943410.

It is an arithmetic number, because the mean of its divisors is an integer number (1393616565480).

Almost surely, 2^{20988557132974} is an apocalyptic number.

20988557132974 is a deficient number, since it is larger than the sum of its proper divisors (12458240438546).

20988557132974 is a wasteful number, since it uses less digits than its factorization.

20988557132974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3358572 (or 3358555 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 70.

The spelling of 20988557132974 in words is "twenty trillion, nine hundred eighty-eight billion, five hundred fifty-seven million, one hundred thirty-two thousand, nine hundred seventy-four".