23139426 has 16 divisors (see below), whose sum is σ = 48291264. Its totient is φ = 7377744.

The previous prime is 23139421. The next prime is 23139427. The reversal of 23139426 is 62493132.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23139393 and 23139402.

It is not an unprimeable number, because it can be changed into a prime (23139421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83701 + ... + 83976.

It is an arithmetic number, because the mean of its divisors is an integer number (3018204).

Almost surely, 2^23139426 is an apocalyptic number.

23139426 is an abundant number, since it is smaller than the sum of its proper divisors (25151838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23139426 is a wasteful number, since it uses less digits than its factorization.

23139426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167705.

The product of its digits is 7776, while the sum is 30.

The square root of 23139426 is about 4810.3457256210. The cubic root of 23139426 is about 284.9601914235.

The spelling of 23139426 in words is "twenty-three million, one hundred thirty-nine thousand, four hundred twenty-six".