20972401912 has 32 divisors (see below), whose sum is σ = 49026395520. Its totient is φ = 8171065440.

The previous prime is 20972401907. The next prime is 20972401937. The reversal of 20972401912 is 21910427902.

It is a super-2 number, since 2×20972401912² (a number of 21 digits) contains 22 as substring.

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, 17022438 + ... + 17023669.

It is an arithmetic number, because the mean of its divisors is an integer number (1532074860).

Almost surely, 2^20972401912 is an apocalyptic number.

20972401912 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20972401912 is an abundant number, since it is smaller than the sum of its proper divisors (28053993608).

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

20972401912 is a wasteful number, since it uses less digits than its factorization.

20972401912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34046131 (or 34046127 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 20972401912 in words is "twenty billion, nine hundred seventy-two million, four hundred one thousand, nine hundred twelve".