21935136 has 48 divisors (see below), whose sum is σ = 59572800. Its totient is φ = 7058688.

The previous prime is 21935119. The next prime is 21935153. The reversal of 21935136 is 63153912.

It is an interprime number because it is at equal distance from previous prime (21935119) and next prime (21935153).

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1156 + ... + 6723.

It is an arithmetic number, because the mean of its divisors is an integer number (1241100).

Almost surely, 2^21935136 is an apocalyptic number.

It is an amenable number.

21935136 is an abundant number, since it is smaller than the sum of its proper divisors (37637664).

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

21935136 is a wasteful number, since it uses less digits than its factorization.

21935136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7921 (or 7913 counting only the distinct ones).

The product of its digits is 4860, while the sum is 30.

The square root of 21935136 is about 4683.4961300294. The cubic root of 21935136 is about 279.9282809512.

The spelling of 21935136 in words is "twenty-one million, nine hundred thirty-five thousand, one hundred thirty-six".