21052445415 has 16 divisors (see below), whose sum is σ = 33686222208. Its totient is φ = 11227201056.

The previous prime is 21052445347. The next prime is 21052445473. The reversal of 21052445415 is 51454425012.

It is a happy number.

It is not a de Polignac number, because 21052445415 - 2⁷ = 21052445287 is a prime.

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, 229692 + ... + 307998.

It is an arithmetic number, because the mean of its divisors is an integer number (2105388888).

Almost surely, 2^21052445415 is an apocalyptic number.

21052445415 is a deficient number, since it is larger than the sum of its proper divisors (12633776793).

21052445415 is a wasteful number, since it uses less digits than its factorization.

21052445415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96238.

The product of its (nonzero) digits is 32000, while the sum is 33.

The spelling of 21052445415 in words is "twenty-one billion, fifty-two million, four hundred forty-five thousand, four hundred fifteen".