21274551037412 has 24 divisors (see below), whose sum is σ = 38237186412600. Its totient is φ = 10349648052480.

The previous prime is 21274551037387. The next prime is 21274551037469. The reversal of 21274551037412 is 21473015547212.

It can be written as a sum of positive squares in 4 ways, for example, as 8550091794916 + 12724459242496 = 2924054^2 + 3567136^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11108462 + ... + 12882042.

It is an arithmetic number, because the mean of its divisors is an integer number (1593216100525).

Almost surely, 2^{21274551037412} is an apocalyptic number.

It is an amenable number.

21274551037412 is a deficient number, since it is larger than the sum of its proper divisors (16962635375188).

21274551037412 is a wasteful number, since it uses less digits than its factorization.

21274551037412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854671 (or 1854669 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 21274551037412 in words is "twenty-one trillion, two hundred seventy-four billion, five hundred fifty-one million, thirty-seven thousand, four hundred twelve".