20255031 has 6 divisors (see below), whose sum is σ = 29257280. Its totient is φ = 13503348.

The previous prime is 20255017. The next prime is 20255057. The reversal of 20255031 is 13055202.

It is a happy number.

It is not a de Polignac number, because 20255031 - 2⁵ = 20254999 is a prime.

It is a super-2 number, since 2×20255031² = 820532561621922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20254995 and 20255013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20250031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1125271 + ... + 1125288.

Almost surely, 2^20255031 is an apocalyptic number.

20255031 is a deficient number, since it is larger than the sum of its proper divisors (9002249).

20255031 is a wasteful number, since it uses less digits than its factorization.

20255031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250565 (or 2250562 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 20255031 is about 4500.5589652842. The cubic root of 20255031 is about 272.5906597315.

It can be divided in two parts, 2025 and 5031, that added together give a square (7056 = 84²).

The spelling of 20255031 in words is "twenty million, two hundred fifty-five thousand, thirty-one".