22931899209 has 6 divisors (see below), whose sum is σ = 33123854426. Its totient is φ = 15287932800.

The previous prime is 22931899187. The next prime is 22931899261. The reversal of 22931899209 is 90299813922.

It can be written as a sum of positive squares in only one way, i.e., 11937747600 + 10994151609 = 109260^2 + 104853^2 .

It is not a de Polignac number, because 22931899209 - 2⁹ = 22931898697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22931899009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1273994392 + ... + 1273994409.

Almost surely, 2^22931899209 is an apocalyptic number.

It is an amenable number.

22931899209 is a deficient number, since it is larger than the sum of its proper divisors (10191955217).

22931899209 is a wasteful number, since it uses less digits than its factorization.

22931899209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547988807 (or 2547988804 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The spelling of 22931899209 in words is "twenty-two billion, nine hundred thirty-one million, eight hundred ninety-nine thousand, two hundred nine".