21700088 has 16 divisors (see below), whose sum is σ = 41554080. Its totient is φ = 10619008.

The previous prime is 21700073. The next prime is 21700103. The reversal of 21700088 is 88000712.

It is an interprime number because it is at equal distance from previous prime (21700073) and next prime (21700103).

It is a congruent number.

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, 28481 + ... + 29232.

It is an arithmetic number, because the mean of its divisors is an integer number (2597130).

Almost surely, 2^21700088 is an apocalyptic number.

It is an amenable number.

21700088 is a deficient number, since it is larger than the sum of its proper divisors (19853992).

21700088 is a wasteful number, since it uses less digits than its factorization.

21700088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57766 (or 57762 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 21700088 is about 4658.3353249847. The cubic root of 21700088 is about 278.9248222657.

The spelling of 21700088 in words is "twenty-one million, seven hundred thousand, eighty-eight".