23145850997 has 4 divisors (see below), whose sum is σ = 23943983820. Its totient is φ = 22347718176.

The previous prime is 23145850993. The next prime is 23145851023. The reversal of 23145850997 is 79905854132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4312680241 + 18833170756 = 65671^2 + 137234^2 .

It is a cyclic number.

It is not a de Polignac number, because 23145850997 - 2² = 23145850993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23145850993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399066368 + ... + 399066425.

It is an arithmetic number, because the mean of its divisors is an integer number (5985995955).

Almost surely, 2^23145850997 is an apocalyptic number.

It is an amenable number.

23145850997 is a deficient number, since it is larger than the sum of its proper divisors (798132823).

23145850997 is an equidigital number, since it uses as much as digits as its factorization.

23145850997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798132822.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 23145850997 in words is "twenty-three billion, one hundred forty-five million, eight hundred fifty thousand, nine hundred ninety-seven".