21574762557412 has 6 divisors (see below), whose sum is σ = 37755834475478. Its totient is φ = 10787381278704.

The previous prime is 21574762557329. The next prime is 21574762557421. The reversal of 21574762557412 is 21475526747512.

It can be written as a sum of positive squares in only one way, i.e., 14973850595236 + 6600911962176 = 3869606^2 + 2569224^2 .

It is a super-2 number, since 2×21574762557412² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2696845319673 + ... + 2696845319680.

Almost surely, 2^{21574762557412} is an apocalyptic number.

It is an amenable number.

21574762557412 is a deficient number, since it is larger than the sum of its proper divisors (16181071918066).

21574762557412 is a wasteful number, since it uses less digits than its factorization.

21574762557412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5393690639357 (or 5393690639355 counting only the distinct ones).

The product of its digits is 32928000, while the sum is 58.

The spelling of 21574762557412 in words is "twenty-one trillion, five hundred seventy-four billion, seven hundred sixty-two million, five hundred fifty-seven thousand, four hundred twelve".