20128832 has 14 divisors (see below), whose sum is σ = 39943278. Its totient is φ = 10064384.

The previous prime is 20128793. The next prime is 20128837. The reversal of 20128832 is 23882102.

It can be written as a sum of positive squares in only one way, i.e., 16192576 + 3936256 = 4024^2 + 1984^2 .

It is not an unprimeable number, because it can be changed into a prime (20128837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157193 + ... + 157320.

Almost surely, 2^20128832 is an apocalyptic number.

It is an amenable number.

20128832 is a deficient number, since it is larger than the sum of its proper divisors (19814446).

20128832 is an equidigital number, since it uses as much as digits as its factorization.

20128832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314525 (or 314515 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20128832 is about 4486.5166889247. The cubic root of 20128832 is about 272.0233543961.

The spelling of 20128832 in words is "twenty million, one hundred twenty-eight thousand, eight hundred thirty-two".