22742321939 has 4 divisors (see below), whose sum is σ = 23297012760. Its totient is φ = 22187631120.

The previous prime is 22742321911. The next prime is 22742321993. The reversal of 22742321939 is 93912324722.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93912324722 = 2 ⋅46956162361.

It is a cyclic number.

It is not a de Polignac number, because 22742321939 - 2⁸ = 22742321683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22742321939.

It is not an unprimeable number, because it can be changed into a prime (22742351939) 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, 277345349 + ... + 277345430.

It is an arithmetic number, because the mean of its divisors is an integer number (5824253190).

Almost surely, 2^22742321939 is an apocalyptic number.

22742321939 is a deficient number, since it is larger than the sum of its proper divisors (554690821).

22742321939 is an equidigital number, since it uses as much as digits as its factorization.

22742321939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554690820.

The product of its digits is 326592, while the sum is 44.

The spelling of 22742321939 in words is "twenty-two billion, seven hundred forty-two million, three hundred twenty-one thousand, nine hundred thirty-nine".