21715024465 has 16 divisors (see below), whose sum is σ = 26493143040. Its totient is φ = 17083205440.

The previous prime is 21715024453. The next prime is 21715024489. The reversal of 21715024465 is 56442051712.

It is not a de Polignac number, because 21715024465 - 2²⁵ = 21681470033 is a prime.

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, 59472 + ... + 216718.

It is an arithmetic number, because the mean of its divisors is an integer number (1655821440).

Almost surely, 2^21715024465 is an apocalyptic number.

It is an amenable number.

21715024465 is a deficient number, since it is larger than the sum of its proper divisors (4778118575).

21715024465 is a wasteful number, since it uses less digits than its factorization.

21715024465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157712.

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 21715024465 in words is "twenty-one billion, seven hundred fifteen million, twenty-four thousand, four hundred sixty-five".