20232156 has 24 divisors (see below), whose sum is σ = 53952640. Its totient is φ = 5780592.

The previous prime is 20232151. The next prime is 20232197. The reversal of 20232156 is 65123202.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20232151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120346 + ... + 120513.

Almost surely, 2^20232156 is an apocalyptic number.

It is an amenable number.

20232156 is an abundant number, since it is smaller than the sum of its proper divisors (33720484).

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

20232156 is a wasteful number, since it uses less digits than its factorization.

20232156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240873 (or 240871 counting only the distinct ones).

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

The square root of 20232156 is about 4498.0168963667. The cubic root of 20232156 is about 272.4880044098.

Adding to 20232156 its reverse (65123202), we get a palindrome (85355358).

The spelling of 20232156 in words is "twenty million, two hundred thirty-two thousand, one hundred fifty-six".