20087156 has 6 divisors (see below), whose sum is σ = 35152530. Its totient is φ = 10043576.

The previous prime is 20087143. The next prime is 20087213. The reversal of 20087156 is 65178002.

It can be written as a sum of positive squares in only one way, i.e., 10784656 + 9302500 = 3284^2 + 3050^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2510891 + ... + 2510898.

It is an arithmetic number, because the mean of its divisors is an integer number (5858755).

Almost surely, 2^20087156 is an apocalyptic number.

It is an amenable number.

20087156 is a deficient number, since it is larger than the sum of its proper divisors (15065374).

20087156 is a wasteful number, since it uses less digits than its factorization.

20087156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5021793 (or 5021791 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 20087156 is about 4481.8696991323. The cubic root of 20087156 is about 271.8354865903.

The spelling of 20087156 in words is "twenty million, eighty-seven thousand, one hundred fifty-six".