20423144031 has 4 divisors (see below), whose sum is σ = 27230858712. Its totient is φ = 13615429352.

The previous prime is 20423144017. The next prime is 20423144033. The reversal of 20423144031 is 13044132402.

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 20423144031 - 2⁵ = 20423143999 is a prime.

It is a super-2 number, since 2×20423144031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20423143992 and 20423144010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423144033) 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, 3403857336 + ... + 3403857341.

It is an arithmetic number, because the mean of its divisors is an integer number (6807714678).

Almost surely, 2^20423144031 is an apocalyptic number.

20423144031 is a deficient number, since it is larger than the sum of its proper divisors (6807714681).

20423144031 is an equidigital number, since it uses as much as digits as its factorization.

20423144031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6807714680.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20423144031 its reverse (13044132402), we get a palindrome (33467276433).

The spelling of 20423144031 in words is "twenty billion, four hundred twenty-three million, one hundred forty-four thousand, thirty-one".