20275131 has 4 divisors (see below), whose sum is σ = 27033512. Its totient is φ = 13516752.

The previous prime is 20275127. The next prime is 20275133. The reversal of 20275131 is 13157202.

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

It is not a de Polignac number, because 20275131 - 2² = 20275127 is a prime.

It is a super-2 number, since 2×20275131² = 822161874134322, 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 = 20275098 and 20275107.

It is not an unprimeable number, because it can be changed into a prime (20275133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3379186 + ... + 3379191.

It is an arithmetic number, because the mean of its divisors is an integer number (6758378).

Almost surely, 2^20275131 is an apocalyptic number.

20275131 is a deficient number, since it is larger than the sum of its proper divisors (6758381).

20275131 is an equidigital number, since it uses as much as digits as its factorization.

20275131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6758380.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20275131 is about 4502.7914675232. The cubic root of 20275131 is about 272.6807980101.

The spelling of 20275131 in words is "twenty million, two hundred seventy-five thousand, one hundred thirty-one".