20423014442231 has 4 divisors (see below), whose sum is σ = 20423063055912. Its totient is φ = 20422965828552.

The previous prime is 20423014442143. The next prime is 20423014442273. The reversal of 20423014442231 is 13224441032402.

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 20423014442231 - 2²⁶ = 20422947333367 is a prime.

It is a super-2 number, since 2×20423014442231² (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 (20423014442431) 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, 23671136 + ... + 24518741.

It is an arithmetic number, because the mean of its divisors is an integer number (5105765763978).

Almost surely, 2^{20423014442231} is an apocalyptic number.

20423014442231 is a deficient number, since it is larger than the sum of its proper divisors (48613681).

20423014442231 is an equidigital number, since it uses as much as digits as its factorization.

20423014442231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48613680.

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

Adding to 20423014442231 its reverse (13224441032402), we get a palindrome (33647455474633).

The spelling of 20423014442231 in words is "twenty trillion, four hundred twenty-three billion, fourteen million, four hundred forty-two thousand, two hundred thirty-one".