21152057427724 has 12 divisors (see below), whose sum is σ = 37016357195664. Its totient is φ = 10575955371824.

The previous prime is 21152057427707. The next prime is 21152057427797. The reversal of 21152057427724 is 42772475025112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17684032 + ... + 18842215.

It is an arithmetic number, because the mean of its divisors is an integer number (3084696432972).

Almost surely, 2^{21152057427724} is an apocalyptic number.

It is an amenable number.

21152057427724 is a deficient number, since it is larger than the sum of its proper divisors (15864299767940).

21152057427724 is a wasteful number, since it uses less digits than its factorization.

21152057427724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36671024 (or 36671022 counting only the distinct ones).

The product of its (nonzero) digits is 2195200, while the sum is 49.

The spelling of 21152057427724 in words is "twenty-one trillion, one hundred fifty-two billion, fifty-seven million, four hundred twenty-seven thousand, seven hundred twenty-four".