20012128 has 24 divisors (see below), whose sum is σ = 41717592. Its totient is φ = 9417216.

The previous prime is 20012119. The next prime is 20012171. The reversal of 20012128 is 82121002.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17850 + ... + 18937.

It is an arithmetic number, because the mean of its divisors is an integer number (1738233).

Almost surely, 2^20012128 is an apocalyptic number.

It is an amenable number.

20012128 is an abundant number, since it is smaller than the sum of its proper divisors (21705464).

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

20012128 is a wasteful number, since it uses less digits than its factorization.

20012128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36814 (or 36806 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 20012128 is about 4473.4917011212. The cubic root of 20012128 is about 271.4966180008.

The spelling of 20012128 in words is "twenty million, twelve thousand, one hundred twenty-eight".