21465160385 has 16 divisors (see below), whose sum is σ = 25935598656. Its totient is φ = 17054173248.

The previous prime is 21465160357. The next prime is 21465160433. The reversal of 21465160385 is 58306156412.

It is a cyclic number.

It is not a de Polignac number, because 21465160385 - 2²⁴ = 21448383169 is a prime.

It is a super-2 number, since 2×21465160385² (a number of 21 digits) contains 22 as substring.

It is a Duffinian 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, 535202 + ... + 573908.

It is an arithmetic number, because the mean of its divisors is an integer number (1620974916).

Almost surely, 2^21465160385 is an apocalyptic number.

It is an amenable number.

21465160385 is a deficient number, since it is larger than the sum of its proper divisors (4470438271).

21465160385 is a wasteful number, since it uses less digits than its factorization.

21465160385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39472.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 21465160385 in words is "twenty-one billion, four hundred sixty-five million, one hundred sixty thousand, three hundred eighty-five".