20324021123431 has 2 divisors, whose sum is σ = 20324021123432. Its totient is φ = 20324021123430.

The previous prime is 20324021123407. The next prime is 20324021123447. The reversal of 20324021123431 is 13432112042302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20324021123431 - 2⁷ = 20324021123303 is a prime.

It is a super-2 number, since 2×20324021123431² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20324021123431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20324021121431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10162010561715 + 10162010561716.

It is an arithmetic number, because the mean of its divisors is an integer number (10162010561716).

Almost surely, 2^{20324021123431} is an apocalyptic number.

20324021123431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20324021123431 is an equidigital number, since it uses as much as digits as its factorization.

20324021123431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 20324021123431 its reverse (13432112042302), we get a palindrome (33756133165733).

The spelling of 20324021123431 in words is "twenty trillion, three hundred twenty-four billion, twenty-one million, one hundred twenty-three thousand, four hundred thirty-one".