20314531 has 4 divisors (see below), whose sum is σ = 20428200. Its totient is φ = 20200864.

The previous prime is 20314523. The next prime is 20314537. The reversal of 20314531 is 13541302.

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 20314531 - 2³ = 20314523 is a prime.

It is a super-2 number, since 2×20314531² = 825360339499922, 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 = 20314499 and 20314508.

It is not an unprimeable number, because it can be changed into a prime (20314537) 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, 56566 + ... + 56923.

It is an arithmetic number, because the mean of its divisors is an integer number (5107050).

Almost surely, 2^20314531 is an apocalyptic number.

20314531 is a deficient number, since it is larger than the sum of its proper divisors (113669).

20314531 is a wasteful number, since it uses less digits than its factorization.

20314531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113668.

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

The square root of 20314531 is about 4507.1644079177. The cubic root of 20314531 is about 272.8573142835.

Adding to 20314531 its reverse (13541302), we get a palindrome (33855833).

The spelling of 20314531 in words is "twenty million, three hundred fourteen thousand, five hundred thirty-one".