20156232 has 64 divisors (see below), whose sum is σ = 52254720. Its totient is φ = 6475328.

The previous prime is 20156219. The next prime is 20156243. The reversal of 20156232 is 23265102.

It is a junction number, because it is equal to n+sod(n) for n = 20156199 and 20156208.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120613 + ... + 120779.

It is an arithmetic number, because the mean of its divisors is an integer number (816480).

Almost surely, 2^20156232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20156232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26127360).

20156232 is an abundant number, since it is smaller than the sum of its proper divisors (32098488).

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

20156232 is a wasteful number, since it uses less digits than its factorization.

20156232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20156232 is about 4489.5692443708. The cubic root of 20156232 is about 272.1467273521.

The spelling of 20156232 in words is "twenty million, one hundred fifty-six thousand, two hundred thirty-two".