23188731005 has 54 divisors (see below), whose sum is σ = 31559319162. Its totient is φ = 16344240000.

The previous prime is 23188730987. The next prime is 23188731023. The reversal of 23188731005 is 50013788132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23188730987) and next prime (23188731023).

It can be written as a sum of positive squares in 3 ways, for example, as 1335317764 + 21853413241 = 36542^2 + 147829^2 .

It is not a de Polignac number, because 23188731005 - 2⁸ = 23188730749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23188731005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 153567680 + ... + 153567830.

Almost surely, 2^23188731005 is an apocalyptic number.

It is an amenable number.

23188731005 is a deficient number, since it is larger than the sum of its proper divisors (8370588157).

23188731005 is an equidigital number, since it uses as much as digits as its factorization.

23188731005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 23188731005 in words is "twenty-three billion, one hundred eighty-eight million, seven hundred thirty-one thousand, five".