20158190 has 32 divisors (see below), whose sum is σ = 40430880. Its totient is φ = 7185024.

The previous prime is 20158181. The next prime is 20158207. The reversal of 20158190 is 9185102.

It is a happy number.

It is a super-2 number, since 2×20158190² = 812705248152200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1097 + ... + 6443.

It is an arithmetic number, because the mean of its divisors is an integer number (1263465).

Almost surely, 2^20158190 is an apocalyptic number.

20158190 is an abundant number, since it is smaller than the sum of its proper divisors (20272690).

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

20158190 is a wasteful number, since it uses less digits than its factorization.

20158190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5396.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 20158190 is about 4489.7873000845. The cubic root of 20158190 is about 272.1555392841.

The spelling of 20158190 in words is "twenty million, one hundred fifty-eight thousand, one hundred ninety".