20129328 has 30 divisors (see below), whose sum is σ = 56334564. Its totient is φ = 6709728.

The previous prime is 20129327. The next prime is 20129339. The reversal of 20129328 is 82392102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20129327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69750 + ... + 70037.

Almost surely, 2^20129328 is an apocalyptic number.

It is an amenable number.

20129328 is an abundant number, since it is smaller than the sum of its proper divisors (36205236).

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

20129328 is a wasteful number, since it uses less digits than its factorization.

20129328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139801 (or 139792 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20129328 is about 4486.5719653205. The cubic root of 20129328 is about 272.0255887114.

The spelling of 20129328 in words is "twenty million, one hundred twenty-nine thousand, three hundred twenty-eight".