20157226 has 8 divisors (see below), whose sum is σ = 30257604. Its totient is φ = 10071360.

The previous prime is 20157211. The next prime is 20157229. The reversal of 20157226 is 62275102.

It can be written as a sum of positive squares in 2 ways, for example, as 17098225 + 3059001 = 4135^2 + 1749^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 20157226.

It is not an unprimeable number, because it can be changed into a prime (20157229) 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, 1056 + ... + 6436.

Almost surely, 2^20157226 is an apocalyptic number.

20157226 is a deficient number, since it is larger than the sum of its proper divisors (10100378).

20157226 is a wasteful number, since it uses less digits than its factorization.

20157226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7256.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20157226 is about 4489.6799440495. The cubic root of 20157226 is about 272.1512008965.

The spelling of 20157226 in words is "twenty million, one hundred fifty-seven thousand, two hundred twenty-six".