20453156 has 12 divisors (see below), whose sum is σ = 36760668. Its totient is φ = 9950112.

The previous prime is 20453123. The next prime is 20453171. The reversal of 20453156 is 65135402.

It can be written as a sum of positive squares in 2 ways, for example, as 11356900 + 9096256 = 3370^2 + 3016^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68951 + ... + 69246.

It is an arithmetic number, because the mean of its divisors is an integer number (3063389).

Almost surely, 2^20453156 is an apocalyptic number.

It is an amenable number.

20453156 is a deficient number, since it is larger than the sum of its proper divisors (16307512).

20453156 is a wasteful number, since it uses less digits than its factorization.

20453156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138238 (or 138236 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 20453156 is about 4522.5165560780. The cubic root of 20453156 is about 273.4765611963.

Adding to 20453156 its reverse (65135402), we get a palindrome (85588558).

The spelling of 20453156 in words is "twenty million, four hundred fifty-three thousand, one hundred fifty-six".