20321996 has 12 divisors (see below), whose sum is σ = 35643552. Its totient is φ = 10138128.

The previous prime is 20321981. The next prime is 20322017. The reversal of 20321996 is 69912302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3635 + ... + 7338.

It is an arithmetic number, because the mean of its divisors is an integer number (2970296).

Almost surely, 2^20321996 is an apocalyptic number.

It is an amenable number.

20321996 is a deficient number, since it is larger than the sum of its proper divisors (15321556).

20321996 is a wasteful number, since it uses less digits than its factorization.

20321996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11440 (or 11438 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 20321996 is about 4507.9924578464. The cubic root of 20321996 is about 272.8907325692.

The spelling of 20321996 in words is "twenty million, three hundred twenty-one thousand, nine hundred ninety-six".