20255190 has 16 divisors (see below), whose sum is σ = 48612528. Its totient is φ = 5401376.

The previous prime is 20255173. The next prime is 20255201. The reversal of 20255190 is 9155202.

It is a super-2 number, since 2×20255190² = 820545443872200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20255190.

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, 337557 + ... + 337616.

It is an arithmetic number, because the mean of its divisors is an integer number (3038283).

Almost surely, 2^20255190 is an apocalyptic number.

20255190 is an abundant number, since it is smaller than the sum of its proper divisors (28357338).

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

20255190 is a wasteful number, since it uses less digits than its factorization.

20255190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675183.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 20255190 is about 4500.5766297220. The cubic root of 20255190 is about 272.5913729996.

The spelling of 20255190 in words is "twenty million, two hundred fifty-five thousand, one hundred ninety".