20320441242431 has 4 divisors (see below), whose sum is σ = 22167754082664. Its totient is φ = 18473128402200.

The previous prime is 20320441242427. The next prime is 20320441242467. The reversal of 20320441242431 is 13424214402302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20320441242431 - 2² = 20320441242427 is a prime.

It is a super-2 number, since 2×20320441242431² (a number of 27 digits) 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 (20320441242331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923656420100 + ... + 923656420121.

It is an arithmetic number, because the mean of its divisors is an integer number (5541938520666).

Almost surely, 2^{20320441242431} is an apocalyptic number.

20320441242431 is a deficient number, since it is larger than the sum of its proper divisors (1847312840233).

20320441242431 is a wasteful number, since it uses less digits than its factorization.

20320441242431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847312840232.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 20320441242431 its reverse (13424214402302), we get a palindrome (33744655644733).

The spelling of 20320441242431 in words is "twenty trillion, three hundred twenty billion, four hundred forty-one million, two hundred forty-two thousand, four hundred thirty-one".