20013328 has 20 divisors (see below), whose sum is σ = 38982748. Its totient is φ = 9953280.

The previous prime is 20013319. The next prime is 20013347. The reversal of 20013328 is 82331002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12873744 + 7139584 = 3588^2 + 2672^2 .

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, 153 + ... + 6328.

Almost surely, 2^20013328 is an apocalyptic number.

It is an amenable number.

20013328 is a deficient number, since it is larger than the sum of its proper divisors (18969420).

20013328 is a wasteful number, since it uses less digits than its factorization.

20013328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6682 (or 6676 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20013328 is about 4473.6258225292. The cubic root of 20013328 is about 271.5020445340.

It can be divided in two parts, 2001 and 3328, that added together give a square (5329 = 73²).

The spelling of 20013328 in words is "twenty million, thirteen thousand, three hundred twenty-eight".