21934115 has 12 divisors (see below), whose sum is σ = 30618576. Its totient is φ = 15040368.

The previous prime is 21934093. The next prime is 21934127. The reversal of 21934115 is 51143912.

It is not a de Polignac number, because 21934115 - 2⁶ = 21934051 is a prime.

It is a super-2 number, since 2×21934115² = 962210801666450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44519 + ... + 45008.

It is an arithmetic number, because the mean of its divisors is an integer number (2551548).

Almost surely, 2^21934115 is an apocalyptic number.

21934115 is a deficient number, since it is larger than the sum of its proper divisors (8684461).

21934115 is an equidigital number, since it uses as much as digits as its factorization.

21934115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89546 (or 89539 counting only the distinct ones).

The product of its digits is 1080, while the sum is 26.

The square root of 21934115 is about 4683.3871289912. The cubic root of 21934115 is about 279.9239376728.

The spelling of 21934115 in words is "twenty-one million, nine hundred thirty-four thousand, one hundred fifteen".