21116888 has 24 divisors (see below), whose sum is σ = 42876900. Its totient is φ = 9745632.

The previous prime is 21116861. The next prime is 21116911. The reversal of 21116888 is 88861112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6458 + ... + 9161.

Almost surely, 2^21116888 is an apocalyptic number.

It is an amenable number.

21116888 is an abundant number, since it is smaller than the sum of its proper divisors (21760012).

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

21116888 is a wasteful number, since it uses less digits than its factorization.

21116888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15651 (or 15634 counting only the distinct ones).

The product of its digits is 6144, while the sum is 35.

The square root of 21116888 is about 4595.3115237163. The cubic root of 21116888 is about 276.4033519950.

The spelling of 21116888 in words is "twenty-one million, one hundred sixteen thousand, eight hundred eighty-eight".