21937514 has 32 divisors (see below), whose sum is σ = 37972800. Its totient is φ = 9434880.

The previous prime is 21937499. The next prime is 21937519. The reversal of 21937514 is 41573912.

It is not an unprimeable number, because it can be changed into a prime (21937519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18149 + ... + 19319.

It is an arithmetic number, because the mean of its divisors is an integer number (1186650).

Almost surely, 2^21937514 is an apocalyptic number.

21937514 is a deficient number, since it is larger than the sum of its proper divisors (16035286).

21937514 is a wasteful number, since it uses less digits than its factorization.

21937514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238.

The product of its digits is 7560, while the sum is 32.

The square root of 21937514 is about 4683.7499933280. The cubic root of 21937514 is about 279.9383963113.

The spelling of 21937514 in words is "twenty-one million, nine hundred thirty-seven thousand, five hundred fourteen".