21216042652024 has 64 divisors (see below), whose sum is σ = 44936428838400. Its totient is φ = 9302083593600.

The previous prime is 21216042651983. The next prime is 21216042652037. The reversal of 21216042652024 is 42025624061212.

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, 1400652 + ... + 6662875.

It is an arithmetic number, because the mean of its divisors is an integer number (702131700600).

Almost surely, 2^{21216042652024} is an apocalyptic number.

It is an amenable number.

21216042652024 is an abundant number, since it is smaller than the sum of its proper divisors (23720386186376).

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

21216042652024 is a wasteful number, since it uses less digits than its factorization.

21216042652024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8064604 (or 8064600 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 21216042652024 in words is "twenty-one trillion, two hundred sixteen billion, forty-two million, six hundred fifty-two thousand, twenty-four".