20939696 has 10 divisors (see below), whose sum is σ = 40570692. Its totient is φ = 10469840.

The previous prime is 20939687. The next prime is 20939701. The reversal of 20939696 is 69693902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654350 + ... + 654381.

Almost surely, 2^20939696 is an apocalyptic number.

It is an amenable number.

20939696 is a deficient number, since it is larger than the sum of its proper divisors (19630996).

20939696 is a wasteful number, since it uses less digits than its factorization.

20939696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308739 (or 1308733 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 20939696 is about 4575.9912587329. The cubic root of 20939696 is about 275.6280784754.

The spelling of 20939696 in words is "twenty million, nine hundred thirty-nine thousand, six hundred ninety-six".