20158426 has 8 divisors (see below), whose sum is σ = 30733524. Its totient is φ = 9913920.

The previous prime is 20158423. The next prime is 20158427. The reversal of 20158426 is 62485102.

It can be written as a sum of positive squares in 2 ways, for example, as 18481401 + 1677025 = 4299^2 + 1295^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20158394 and 20158403.

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 3 ways as a sum of consecutive naturals, for example, 82495 + ... + 82738.

Almost surely, 2^20158426 is an apocalyptic number.

20158426 is a deficient number, since it is larger than the sum of its proper divisors (10575098).

20158426 is a wasteful number, since it uses less digits than its factorization.

20158426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165296.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 20158426 is about 4489.8135818762. The cubic root of 20158426 is about 272.1566013579.

The spelling of 20158426 in words is "twenty million, one hundred fifty-eight thousand, four hundred twenty-six".