20372056 has 16 divisors (see below), whose sum is σ = 39011040. Its totient is φ = 9969120.

The previous prime is 20372029. The next prime is 20372059. The reversal of 20372056 is 65027302.

It is a self number, because there is not a number n which added to its sum of digits gives 20372056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20372059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26715 + ... + 27466.

It is an arithmetic number, because the mean of its divisors is an integer number (2438190).

Almost surely, 2^20372056 is an apocalyptic number.

It is an amenable number.

20372056 is a deficient number, since it is larger than the sum of its proper divisors (18638984).

20372056 is a wasteful number, since it uses less digits than its factorization.

20372056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54234 (or 54230 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 20372056 is about 4513.5414033772. The cubic root of 20372056 is about 273.1146231136.

Adding to 20372056 its reverse (65027302), we get a palindrome (85399358).

The spelling of 20372056 in words is "twenty million, three hundred seventy-two thousand, fifty-six".