20112728 has 8 divisors (see below), whose sum is σ = 37711380. Its totient is φ = 10056360.

The previous prime is 20112727. The next prime is 20112739. The reversal of 20112728 is 82721102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257038 + ... + 1257053.

Almost surely, 2^20112728 is an apocalyptic number.

It is an amenable number.

20112728 is a deficient number, since it is larger than the sum of its proper divisors (17598652).

20112728 is a wasteful number, since it uses less digits than its factorization.

20112728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514097 (or 2514093 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 20112728 is about 4484.7216190083. The cubic root of 20112728 is about 271.9507912710.

The spelling of 20112728 in words is "twenty million, one hundred twelve thousand, seven hundred twenty-eight".