21620474255512 has 32 divisors (see below), whose sum is σ = 44516569536000. Its totient is φ = 9762405588000.

The previous prime is 21620474255473. The next prime is 21620474255533. The reversal of 21620474255512 is 21555247402612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813520512 + ... + 813547087.

It is an arithmetic number, because the mean of its divisors is an integer number (1391142798000).

Almost surely, 2^{21620474255512} is an apocalyptic number.

21620474255512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21620474255512 is an abundant number, since it is smaller than the sum of its proper divisors (22896095280488).

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

21620474255512 is a wasteful number, since it uses less digits than its factorization.

21620474255512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627067767 (or 1627067763 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 46.

The spelling of 21620474255512 in words is "twenty-one trillion, six hundred twenty billion, four hundred seventy-four million, two hundred fifty-five thousand, five hundred twelve".