20256198 has 16 divisors (see below), whose sum is σ = 40627200. Its totient is φ = 6732936.

The previous prime is 20256161. The next prime is 20256217. The reversal of 20256198 is 89165202.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2398 + ... + 6801.

It is an arithmetic number, because the mean of its divisors is an integer number (2539200).

Almost surely, 2^20256198 is an apocalyptic number.

20256198 is an abundant number, since it is smaller than the sum of its proper divisors (20371002).

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

20256198 is a wasteful number, since it uses less digits than its factorization.

20256198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9571.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 20256198 is about 4500.6886139790. The cubic root of 20256198 is about 272.5958947633.

The spelling of 20256198 in words is "twenty million, two hundred fifty-six thousand, one hundred ninety-eight".