20328836 has 24 divisors (see below), whose sum is σ = 39861696. Its totient is φ = 8989920.

The previous prime is 20328817. The next prime is 20328853. The reversal of 20328836 is 63882302.

It is a happy number.

It is a super-2 number, since 2×20328836² = 826523146229792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4616 + ... + 7871.

It is an arithmetic number, because the mean of its divisors is an integer number (1660904).

Almost surely, 2^20328836 is an apocalyptic number.

It is an amenable number.

20328836 is a deficient number, since it is larger than the sum of its proper divisors (19532860).

20328836 is a wasteful number, since it uses less digits than its factorization.

20328836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12539 (or 12537 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 20328836 is about 4508.7510465760. The cubic root of 20328836 is about 272.9213457569.

The spelling of 20328836 in words is "twenty million, three hundred twenty-eight thousand, eight hundred thirty-six".