21700883 has 2 divisors, whose sum is σ = 21700884. Its totient is φ = 21700882.

The previous prime is 21700873. The next prime is 21700901. The reversal of 21700883 is 38800712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21700883 - 2¹⁴ = 21684499 is a prime.

It is not a weakly prime, because it can be changed into another prime (21700843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10850441 + 10850442.

It is an arithmetic number, because the mean of its divisors is an integer number (10850442).

Almost surely, 2^21700883 is an apocalyptic number.

21700883 is a deficient number, since it is larger than the sum of its proper divisors (1).

21700883 is an equidigital number, since it uses as much as digits as its factorization.

21700883 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 21700883 is about 4658.4206551148. The cubic root of 21700883 is about 278.9282284351.

The spelling of 21700883 in words is "twenty-one million, seven hundred thousand, eight hundred eighty-three".