23398469138 has 18 divisors (see below), whose sum is σ = 38582391477. Its totient is φ = 10634586160.

The previous prime is 23398469123. The next prime is 23398469147. The reversal of 23398469138 is 83196489332.

It can be written as a sum of positive squares in 2 ways, for example, as 23388502489 + 9966649 = 152933^2 + 3157^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=108163.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2374670 + ... + 2384502.

Almost surely, 2^23398469138 is an apocalyptic number.

23398469138 is a deficient number, since it is larger than the sum of its proper divisors (15183922339).

23398469138 is an frugal number, since it uses more digits than its factorization.

23398469138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19690 (or 9846 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 56.

The spelling of 23398469138 in words is "twenty-three billion, three hundred ninety-eight million, four hundred sixty-nine thousand, one hundred thirty-eight".