21608082824 has 16 divisors (see below), whose sum is σ = 40519140300. Its totient is φ = 10802978752.

The previous prime is 21608082731. The next prime is 21608082863. The reversal of 21608082824 is 42828080612.

It can be written as a sum of positive squares in 2 ways, for example, as 21281557924 + 326524900 = 145882^2 + 18070^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42827 + ... + 212250.

Almost surely, 2^21608082824 is an apocalyptic number.

It is an amenable number.

21608082824 is a deficient number, since it is larger than the sum of its proper divisors (18911057476).

21608082824 is a wasteful number, since it uses less digits than its factorization.

21608082824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265672 (or 265668 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 41.

The spelling of 21608082824 in words is "twenty-one billion, six hundred eight million, eighty-two thousand, eight hundred twenty-four".