20318996 has 6 divisors (see below), whose sum is σ = 35558250. Its totient is φ = 10159496.

The previous prime is 20318989. The next prime is 20319007. The reversal of 20318996 is 69981302.

It can be written as a sum of positive squares in only one way, i.e., 13104400 + 7214596 = 3620^2 + 2686^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2539871 + ... + 2539878.

It is an arithmetic number, because the mean of its divisors is an integer number (5926375).

Almost surely, 2^20318996 is an apocalyptic number.

It is an amenable number.

20318996 is a deficient number, since it is larger than the sum of its proper divisors (15239254).

20318996 is a wasteful number, since it uses less digits than its factorization.

20318996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5079753 (or 5079751 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 20318996 is about 4507.6597032163. The cubic root of 20318996 is about 272.8773035654.

The spelling of 20318996 in words is "twenty million, three hundred eighteen thousand, nine hundred ninety-six".