20360431 has 12 divisors (see below), whose sum is σ = 25507272. Its totient is φ = 16108848.

The previous prime is 20360423. The next prime is 20360449. The reversal of 20360431 is 13406302.

It is not a de Polignac number, because 20360431 - 2³ = 20360423 is a prime.

It is a super-2 number, since 2×20360431² = 829094301011522, which contains 22 as substring.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 20360399 and 20360408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20360491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15345 + ... + 16618.

It is an arithmetic number, because the mean of its divisors is an integer number (2125606).

Almost surely, 2^20360431 is an apocalyptic number.

20360431 is a deficient number, since it is larger than the sum of its proper divisors (5146841).

20360431 is a wasteful number, since it uses less digits than its factorization.

20360431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31990 (or 31983 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20360431 is about 4512.2534281665. The cubic root of 20360431 is about 273.0626636779.

Adding to 20360431 its reverse (13406302), we get a palindrome (33766733).

The spelling of 20360431 in words is "twenty million, three hundred sixty thousand, four hundred thirty-one".