21914412 has 24 divisors (see below), whose sum is σ = 55067376. Its totient is φ = 6742848.

The previous prime is 21914369. The next prime is 21914413. The reversal of 21914412 is 21441912.

It is not an unprimeable number, because it can be changed into a prime (21914413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70083 + ... + 70394.

It is an arithmetic number, because the mean of its divisors is an integer number (2294474).

Almost surely, 2^21914412 is an apocalyptic number.

It is an amenable number.

21914412 is an abundant number, since it is smaller than the sum of its proper divisors (33152964).

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

21914412 is a wasteful number, since it uses less digits than its factorization.

21914412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140497 (or 140495 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 21914412 is about 4681.2831574260. The cubic root of 21914412 is about 279.8400957731.

The spelling of 21914412 in words is "twenty-one million, nine hundred fourteen thousand, four hundred twelve".