21298914 has 48 divisors (see below), whose sum is σ = 56801472. Its totient is φ = 5616864.

The previous prime is 21298903. The next prime is 21298931. The reversal of 21298914 is 41989212.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4864 + ... + 8139.

It is an arithmetic number, because the mean of its divisors is an integer number (1183364).

Almost surely, 2^21298914 is an apocalyptic number.

21298914 is an abundant number, since it is smaller than the sum of its proper divisors (35502558).

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

21298914 is a wasteful number, since it uses less digits than its factorization.

21298914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13031 (or 13028 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 21298914 is about 4615.0746472836. The cubic root of 21298914 is about 277.1952729965.

The spelling of 21298914 in words is "twenty-one million, two hundred ninety-eight thousand, nine hundred fourteen".