21610089156 has 12 divisors (see below), whose sum is σ = 50423541392. Its totient is φ = 7203363048.

The previous prime is 21610089103. The next prime is 21610089169. The reversal of 21610089156 is 65198001612.

It is a tau number, because it is divible by the number of its divisors (12).

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, 900420370 + ... + 900420393.

Almost surely, 2^21610089156 is an apocalyptic number.

It is an amenable number.

21610089156 is an abundant number, since it is smaller than the sum of its proper divisors (28813452236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21610089156 is a wasteful number, since it uses less digits than its factorization.

21610089156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800840770 (or 1800840768 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The spelling of 21610089156 in words is "twenty-one billion, six hundred ten million, eighty-nine thousand, one hundred fifty-six".