22338520391 has 20 divisors (see below), whose sum is σ = 25640963760. Its totient is φ = 19424507520.

The previous prime is 22338520367. The next prime is 22338520411. The reversal of 22338520391 is 19302583322.

It is not a de Polignac number, because 22338520391 - 2³⁰ = 21264778567 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22338520291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 303575 + ... + 369911.

It is an arithmetic number, because the mean of its divisors is an integer number (1282048188).

Almost surely, 2^22338520391 is an apocalyptic number.

22338520391 is a deficient number, since it is larger than the sum of its proper divisors (3302443369).

22338520391 is an frugal number, since it uses more digits than its factorization.

22338520391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66404 (or 66371 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 22338520391 in words is "twenty-two billion, three hundred thirty-eight million, five hundred twenty thousand, three hundred ninety-one".