20371431 has 8 divisors (see below), whose sum is σ = 27299200. Its totient is φ = 13512312.

The previous prime is 20371381. The next prime is 20371447. The reversal of 20371431 is 13417302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20371431 - 2⁶ = 20371367 is a prime.

It is a super-2 number, since 2×20371431² = 829990401975522, 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 = 20371398 and 20371407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20371231) 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 7 ways as a sum of consecutive naturals, for example, 16465 + ... + 17658.

It is an arithmetic number, because the mean of its divisors is an integer number (3412400).

Almost surely, 2^20371431 is an apocalyptic number.

20371431 is a deficient number, since it is larger than the sum of its proper divisors (6927769).

20371431 is a wasteful number, since it uses less digits than its factorization.

20371431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34325.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 20371431 is about 4513.4721667470. The cubic root of 20371431 is about 273.1118300984. Note that the first 3 decimals are identical.

Adding to 20371431 its reverse (13417302), we get a palindrome (33788733).

It can be divided in two parts, 20371 and 431, that added together give a palindrome (20802).

The spelling of 20371431 in words is "twenty million, three hundred seventy-one thousand, four hundred thirty-one".