21914908 has 12 divisors (see below), whose sum is σ = 38419920. Its totient is φ = 10937792.

The previous prime is 21914903. The next prime is 21914927. The reversal of 21914908 is 80941912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21914903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2248 + ... + 6991.

It is an arithmetic number, because the mean of its divisors is an integer number (3201660).

Almost surely, 2^21914908 is an apocalyptic number.

It is an amenable number.

21914908 is a deficient number, since it is larger than the sum of its proper divisors (16505012).

21914908 is a wasteful number, since it uses less digits than its factorization.

21914908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9836 (or 9834 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 21914908 is about 4681.3361340540. The cubic root of 21914908 is about 279.8422070114.

It can be divided in two parts, 21914 and 908, that added together give a palindrome (22822).

The spelling of 21914908 in words is "twenty-one million, nine hundred fourteen thousand, nine hundred eight".