20132431 has 8 divisors (see below), whose sum is σ = 22181328. Its totient is φ = 18120000.

The previous prime is 20132407. The next prime is 20132443. The reversal of 20132431 is 13423102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20132431 - 2⁷ = 20132303 is a prime.

It is a super-2 number, since 2×20132431² = 810629555939522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132401) 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 7 ways as a sum of consecutive naturals, for example, 7950 + ... + 10171.

It is an arithmetic number, because the mean of its divisors is an integer number (2772666).

Almost surely, 2^20132431 is an apocalyptic number.

20132431 is a deficient number, since it is larger than the sum of its proper divisors (2048897).

20132431 is a wasteful number, since it uses less digits than its factorization.

20132431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18233.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20132431 is about 4486.9177616711. The cubic root of 20132431 is about 272.0395658635.

Adding to 20132431 its reverse (13423102), we get a palindrome (33555533).

It can be divided in two parts, 2013 and 2431, that added together give a palindrome (4444).

The spelling of 20132431 in words is "twenty million, one hundred thirty-two thousand, four hundred thirty-one".