20295231 has 16 divisors (see below), whose sum is σ = 29635200. Its totient is φ = 12252320.

The previous prime is 20295227. The next prime is 20295239. The reversal of 20295231 is 13259202.

It is a cyclic number.

It is not a de Polignac number, because 20295231 - 2² = 20295227 is a prime.

It is a super-4 number, since 4×20295231⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20295239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8620 + ... + 10718.

It is an arithmetic number, because the mean of its divisors is an integer number (1852200).

Almost surely, 2^20295231 is an apocalyptic number.

20295231 is a deficient number, since it is larger than the sum of its proper divisors (9339969).

20295231 is a wasteful number, since it uses less digits than its factorization.

20295231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 20295231 is about 4505.0228634270. The cubic root of 20295231 is about 272.7708767352.

It can be divided in two parts, 2029 and 5231, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 20295231 in words is "twenty million, two hundred ninety-five thousand, two hundred thirty-one".