21255324142996 has 48 divisors (see below), whose sum is σ = 40470989493760. Its totient is φ = 9730655141760.

The previous prime is 21255324142979. The next prime is 21255324143017. The reversal of 21255324142996 is 69924142355212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4175415 + ... + 7742398.

Almost surely, 2^{21255324142996} is an apocalyptic number.

It is an amenable number.

21255324142996 is a deficient number, since it is larger than the sum of its proper divisors (19215665350764).

21255324142996 is a wasteful number, since it uses less digits than its factorization.

21255324142996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11918624 (or 11918622 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 55.

The spelling of 21255324142996 in words is "twenty-one trillion, two hundred fifty-five billion, three hundred twenty-four million, one hundred forty-two thousand, nine hundred ninety-six".