21112624465 has 16 divisors (see below), whose sum is σ = 25824116736. Its totient is φ = 16564392000.

The previous prime is 21112624441. The next prime is 21112624529. The reversal of 21112624465 is 56442621112.

It is not a de Polignac number, because 21112624465 - 2⁵ = 21112624433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21112624465.

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, 660400 + ... + 691630.

It is an arithmetic number, because the mean of its divisors is an integer number (1614007296).

Almost surely, 2^21112624465 is an apocalyptic number.

It is an amenable number.

21112624465 is a deficient number, since it is larger than the sum of its proper divisors (4711492271).

21112624465 is a wasteful number, since it uses less digits than its factorization.

21112624465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33840.

The product of its digits is 23040, while the sum is 34.

The spelling of 21112624465 in words is "twenty-one billion, one hundred twelve million, six hundred twenty-four thousand, four hundred sixty-five".