20384688 has 40 divisors (see below), whose sum is σ = 52996608. Its totient is φ = 6751552.

The previous prime is 20384687. The next prime is 20384711. The reversal of 20384688 is 88648302.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20384681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6745 + ... + 9287.

Almost surely, 2^20384688 is an apocalyptic number.

It is an amenable number.

20384688 is an abundant number, since it is smaller than the sum of its proper divisors (32611920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20384688 is a wasteful number, since it uses less digits than its factorization.

20384688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721 (or 2715 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 20384688 is about 4514.9405311698. The cubic root of 20384688 is about 273.1710610613.

The spelling of 20384688 in words is "twenty million, three hundred eighty-four thousand, six hundred eighty-eight".