21914136 has 24 divisors (see below), whose sum is σ = 59350980. Its totient is φ = 7304688.

The previous prime is 21914129. The next prime is 21914141. The reversal of 21914136 is 63141912.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

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, 152110 + ... + 152253.

Almost surely, 2^21914136 is an apocalyptic number.

It is an amenable number.

21914136 is an abundant number, since it is smaller than the sum of its proper divisors (37436844).

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

21914136 is a wasteful number, since it uses less digits than its factorization.

21914136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304375 (or 304368 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 21914136 is about 4681.2536782362. The cubic root of 21914136 is about 279.8389209573.

The spelling of 21914136 in words is "twenty-one million, nine hundred fourteen thousand, one hundred thirty-six".