20388072 has 32 divisors (see below), whose sum is σ = 51379200. Its totient is φ = 6741504.

The previous prime is 20388061. The next prime is 20388077. The reversal of 20388072 is 27088302.

It is not an unprimeable number, because it can be changed into a prime (20388077) 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, 297 + ... + 6392.

It is an arithmetic number, because the mean of its divisors is an integer number (1605600).

Almost surely, 2^20388072 is an apocalyptic number.

It is an amenable number.

20388072 is an abundant number, since it is smaller than the sum of its proper divisors (30991128).

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

20388072 is a wasteful number, since it uses less digits than its factorization.

20388072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6825 (or 6821 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 20388072 is about 4515.3152713847. The cubic root of 20388072 is about 273.1861763237.

The spelling of 20388072 in words is "twenty million, three hundred eighty-eight thousand, seventy-two".