21737624545 has 64 divisors (see below), whose sum is σ = 33210777600. Its totient is φ = 13287110400.

The previous prime is 21737624539. The next prime is 21737624563. The reversal of 21737624545 is 54542673712.

It is not a de Polignac number, because 21737624545 - 2²¹ = 21735527393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21737624495 and 21737624504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8052606 + ... + 8055304.

It is an arithmetic number, because the mean of its divisors is an integer number (518918400).

Almost surely, 2^21737624545 is an apocalyptic number.

It is an amenable number.

21737624545 is a deficient number, since it is larger than the sum of its proper divisors (11473153055).

21737624545 is a wasteful number, since it uses less digits than its factorization.

21737624545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326.

The product of its digits is 1411200, while the sum is 46.

The spelling of 21737624545 in words is "twenty-one billion, seven hundred thirty-seven million, six hundred twenty-four thousand, five hundred forty-five".