20236975 has 12 divisors (see below), whose sum is σ = 27375480. Its totient is φ = 14717600.

The previous prime is 20236973. The next prime is 20237003. The reversal of 20236975 is 57963202.

It is a happy number.

It is not a de Polignac number, because 20236975 - 2¹ = 20236973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20236975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20236973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36520 + ... + 37069.

It is an arithmetic number, because the mean of its divisors is an integer number (2281290).

Almost surely, 2^20236975 is an apocalyptic number.

20236975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20236975 is a deficient number, since it is larger than the sum of its proper divisors (7138505).

20236975 is a wasteful number, since it uses less digits than its factorization.

20236975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73610 (or 73605 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 20236975 is about 4498.5525449860. The cubic root of 20236975 is about 272.5096368951.

It can be divided in two parts, 2023 and 6975, that added together give a palindrome (8998).

The spelling of 20236975 in words is "twenty million, two hundred thirty-six thousand, nine hundred seventy-five".