20953737991488 has 56 divisors (see below), whose sum is σ = 55467667880800. Its totient is φ = 6981106014720.

The previous prime is 20953737991463. The next prime is 20953737991519. The reversal of 20953737991488 is 88419973735902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26748163 + ... + 27520386.

It is an arithmetic number, because the mean of its divisors is an integer number (990494069300).

Almost surely, 2^{20953737991488} is an apocalyptic number.

It is an amenable number.

20953737991488 is an abundant number, since it is smaller than the sum of its proper divisors (34513929889312).

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

20953737991488 is a wasteful number, since it uses less digits than its factorization.

20953737991488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54270575 (or 54270565 counting only the distinct ones).

The product of its (nonzero) digits is 823011840, while the sum is 75.

The spelling of 20953737991488 in words is "twenty trillion, nine hundred fifty-three billion, seven hundred thirty-seven million, nine hundred ninety-one thousand, four hundred eighty-eight".