20110128 has 20 divisors (see below), whose sum is σ = 51951288. Its totient is φ = 6703360.

The previous prime is 20110109. The next prime is 20110141. The reversal of 20110128 is 82101102.

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, 209433 + ... + 209528.

Almost surely, 2^20110128 is an apocalyptic number.

It is an amenable number.

20110128 is an abundant number, since it is smaller than the sum of its proper divisors (31841160).

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

20110128 is a wasteful number, since it uses less digits than its factorization.

20110128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418972 (or 418966 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 20110128 is about 4484.4317365749. The cubic root of 20110128 is about 271.9390722818.

The spelling of 20110128 in words is "twenty million, one hundred ten thousand, one hundred twenty-eight".