20260531 has 6 divisors (see below), whose sum is σ = 20984132. Its totient is φ = 19561080.

The previous prime is 20260529. The next prime is 20260543. The reversal of 20260531 is 13506202.

It is a happy number.

It is not a de Polignac number, because 20260531 - 2¹ = 20260529 is a prime.

It is a super-2 number, since 2×20260531² = 820978232803922, 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 = 20260499 and 20260508.

It is not an unprimeable number, because it can be changed into a prime (20260511) 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 5 ways as a sum of consecutive naturals, for example, 11205 + ... + 12886.

Almost surely, 2^20260531 is an apocalyptic number.

20260531 is a deficient number, since it is larger than the sum of its proper divisors (723601).

20260531 is an equidigital number, since it uses as much as digits as its factorization.

20260531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24149 (or 24120 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20260531 is about 4501.1699590218. The cubic root of 20260531 is about 272.6153303586.

Adding to 20260531 its reverse (13506202), we get a palindrome (33766733).

The spelling of 20260531 in words is "twenty million, two hundred sixty thousand, five hundred thirty-one".