23142320421 has 32 divisors (see below), whose sum is σ = 35412595200. Its totient is φ = 13312447680.

The previous prime is 23142320413. The next prime is 23142320437. The reversal of 23142320421 is 12402324132.

It is a happy number.

It is not a de Polignac number, because 23142320421 - 2³ = 23142320413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23142320391 and 23142320400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23142320441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148471 + ... + 261396.

It is an arithmetic number, because the mean of its divisors is an integer number (1106643600).

Almost surely, 2^23142320421 is an apocalyptic number.

It is an amenable number.

23142320421 is a deficient number, since it is larger than the sum of its proper divisors (12270274779).

23142320421 is a wasteful number, since it uses less digits than its factorization.

23142320421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409969.

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

Adding to 23142320421 its reverse (12402324132), we get a palindrome (35544644553).

The spelling of 23142320421 in words is "twenty-three billion, one hundred forty-two million, three hundred twenty thousand, four hundred twenty-one".