23420202431 has 4 divisors (see below), whose sum is σ = 24175692864. Its totient is φ = 22664712000.

The previous prime is 23420202419. The next prime is 23420202437. The reversal of 23420202431 is 13420202432.

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 23420202431 - 2¹⁴ = 23420186047 is a prime.

It is a super-2 number, since 2×23420202431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23420202397 and 23420202406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23420202437) 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, 377745170 + ... + 377745231.

It is an arithmetic number, because the mean of its divisors is an integer number (6043923216).

Almost surely, 2^23420202431 is an apocalyptic number.

23420202431 is a deficient number, since it is larger than the sum of its proper divisors (755490433).

23420202431 is an equidigital number, since it uses as much as digits as its factorization.

23420202431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755490432.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 23420202431 its reverse (13420202432), we get a palindrome (36840404863).

Subtracting from 23420202431 its reverse (13420202432), we obtain a palindrome (9999999999).

The spelling of 23420202431 in words is "twenty-three billion, four hundred twenty million, two hundred two thousand, four hundred thirty-one".