20937964 has 6 divisors (see below), whose sum is σ = 36641444. Its totient is φ = 10468980.

The previous prime is 20937953. The next prime is 20938013. The reversal of 20937964 is 46973902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2617242 + ... + 2617249.

Almost surely, 2^20937964 is an apocalyptic number.

It is an amenable number.

20937964 is a deficient number, since it is larger than the sum of its proper divisors (15703480).

20937964 is a wasteful number, since it uses less digits than its factorization.

20937964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234495 (or 5234493 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 20937964 is about 4575.8020062061. The cubic root of 20937964 is about 275.6204788587.

The spelling of 20937964 in words is "twenty million, nine hundred thirty-seven thousand, nine hundred sixty-four".