20128332 has 24 divisors (see below), whose sum is σ = 53675776. Its totient is φ = 5750928.

The previous prime is 20128327. The next prime is 20128337. The reversal of 20128332 is 23382102.

It is an interprime number because it is at equal distance from previous prime (20128327) and next prime (20128337).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20128299 and 20128308.

It is not an unprimeable number, because it can be changed into a prime (20128337) 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, 119728 + ... + 119895.

Almost surely, 2^20128332 is an apocalyptic number.

It is an amenable number.

20128332 is an abundant number, since it is smaller than the sum of its proper divisors (33547444).

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

20128332 is a wasteful number, since it uses less digits than its factorization.

20128332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239637 (or 239635 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20128332 is about 4486.4609660622. The cubic root of 20128332 is about 272.0211020249.

The spelling of 20128332 in words is "twenty million, one hundred twenty-eight thousand, three hundred thirty-two".