20134728 has 24 divisors (see below), whose sum is σ = 54531750. Its totient is φ = 6711552.

The previous prime is 20134711. The next prime is 20134733. The reversal of 20134728 is 82743102.

It can be written as a sum of positive squares in only one way, i.e., 19554084 + 580644 = 4422^2 + 762^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139753 + ... + 139896.

Almost surely, 2^20134728 is an apocalyptic number.

It is an amenable number.

20134728 is an abundant number, since it is smaller than the sum of its proper divisors (34397022).

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

20134728 is a wasteful number, since it uses less digits than its factorization.

20134728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279661 (or 279654 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20134728 is about 4487.1737207289. The cubic root of 20134728 is about 272.0499115443.

The spelling of 20134728 in words is "twenty million, one hundred thirty-four thousand, seven hundred twenty-eight".