20025231 has 4 divisors (see below), whose sum is σ = 26700312. Its totient is φ = 13350152.

The previous prime is 20025227. The next prime is 20025241. The reversal of 20025231 is 13252002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20025231 - 2² = 20025227 is a prime.

It is a super-2 number, since 2×20025231² = 802019753206722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20025231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20025211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3337536 + ... + 3337541.

It is an arithmetic number, because the mean of its divisors is an integer number (6675078).

Almost surely, 2^20025231 is an apocalyptic number.

20025231 is a deficient number, since it is larger than the sum of its proper divisors (6675081).

20025231 is an equidigital number, since it uses as much as digits as its factorization.

20025231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6675080.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20025231 is about 4474.9559774371. The cubic root of 20025231 is about 271.5558594777. Note that the first 3 decimals are identical.

Adding to 20025231 its reverse (13252002), we get a palindrome (33277233).

The spelling of 20025231 in words is "twenty million, twenty-five thousand, two hundred thirty-one".