20324431431 has 12 divisors (see below), whose sum is σ = 29642537808. Its totient is φ = 13418070624.

The previous prime is 20324431403. The next prime is 20324431453. The reversal of 20324431431 is 13413442302.

20324431431 is a `hidden beast` number, since 20 + 324 + 4 + 314 + 3 + 1 = 666.

It is not a de Polignac number, because 20324431431 - 2¹¹ = 20324429383 is a prime.

It is a super-2 number, since 2×20324431431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20324431395 and 20324431404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20324431331) 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, 10961550 + ... + 10963403.

It is an arithmetic number, because the mean of its divisors is an integer number (2470211484).

Almost surely, 2^20324431431 is an apocalyptic number.

20324431431 is a deficient number, since it is larger than the sum of its proper divisors (9318106377).

20324431431 is a wasteful number, since it uses less digits than its factorization.

20324431431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21925062 (or 21925059 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 20324431431 its reverse (13413442302), we get a palindrome (33737873733).

The spelling of 20324431431 in words is "twenty billion, three hundred twenty-four million, four hundred thirty-one thousand, four hundred thirty-one".