20231317366625 has 8 divisors (see below), whose sum is σ = 25248684073704. Its totient is φ = 16185053893200.

The previous prime is 20231317366619. The next prime is 20231317366697. The reversal of 20231317366625 is 52666371313202.

It can be written as a sum of positive squares in 4 ways, for example, as 5328567440161 + 14902749926464 = 2308369^2 + 3860408^2 .

It is not a de Polignac number, because 20231317366625 - 2²² = 20231313172321 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 20231317366625.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80925269342 + ... + 80925269591.

It is an arithmetic number, because the mean of its divisors is an integer number (3156085509213).

Almost surely, 2^{20231317366625} is an apocalyptic number.

20231317366625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20231317366625 is a deficient number, since it is larger than the sum of its proper divisors (5017366707079).

20231317366625 is an equidigital number, since it uses as much as digits as its factorization.

20231317366625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161850538948 (or 161850538938 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 47.

Adding to 20231317366625 its reverse (52666371313202), we get a palindrome (72897688679827).

The spelling of 20231317366625 in words is "twenty trillion, two hundred thirty-one billion, three hundred seventeen million, three hundred sixty-six thousand, six hundred twenty-five".