21610732885 has 24 divisors (see below), whose sum is σ = 30309862176. Its totient is φ = 14748521760.

The previous prime is 21610732859. The next prime is 21610732907. The reversal of 21610732885 is 58823701612.

It is not a de Polignac number, because 21610732885 - 2⁵ = 21610732853 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157327 + ... + 260716.

It is an arithmetic number, because the mean of its divisors is an integer number (1262910924).

Almost surely, 2^21610732885 is an apocalyptic number.

It is an amenable number.

21610732885 is a deficient number, since it is larger than the sum of its proper divisors (8699129291).

21610732885 is a wasteful number, since it uses less digits than its factorization.

21610732885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418273 (or 418266 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 21610732885 in words is "twenty-one billion, six hundred ten million, seven hundred thirty-two thousand, eight hundred eighty-five".