20158422 has 16 divisors (see below), whose sum is σ = 41707440. Its totient is φ = 6487712.

The previous prime is 20158421. The next prime is 20158423. The reversal of 20158422 is 22485102.

It is an interprime number because it is at equal distance from previous prime (20158421) and next prime (20158423).

It is a junction number, because it is equal to n+sod(n) for n = 20158392 and 20158401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20158421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57753 + ... + 58100.

It is an arithmetic number, because the mean of its divisors is an integer number (2606715).

Almost surely, 2^20158422 is an apocalyptic number.

20158422 is an abundant number, since it is smaller than the sum of its proper divisors (21549018).

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

20158422 is a wasteful number, since it uses less digits than its factorization.

20158422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115887.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 20158422 is about 4489.8131364234. The cubic root of 20158422 is about 272.1565833567.

The spelling of 20158422 in words is "twenty million, one hundred fifty-eight thousand, four hundred twenty-two".