20837474688 has 32 divisors (see below), whose sum is σ = 55349543160. Its totient is φ = 6945824768.

The previous prime is 20837474687. The next prime is 20837474701. The reversal of 20837474688 is 88647473802.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20837474687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27131745 + ... + 27132512.

Almost surely, 2^20837474688 is an apocalyptic number.

It is an amenable number.

20837474688 is an abundant number, since it is smaller than the sum of its proper divisors (34512068472).

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

20837474688 is an equidigital number, since it uses as much as digits as its factorization.

20837474688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54264274 (or 54264262 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 57.

The spelling of 20837474688 in words is "twenty billion, eight hundred thirty-seven million, four hundred seventy-four thousand, six hundred eighty-eight".