23181966425 has 6 divisors (see below), whose sum is σ = 28745638398. Its totient is φ = 18545573120.

The previous prime is 23181966413. The next prime is 23181966449. The reversal of 23181966425 is 52466918132.

It can be written as a sum of positive squares in 3 ways, for example, as 6178588816 + 17003377609 = 78604^2 + 130397^2 .

It is not a de Polignac number, because 23181966425 - 2⁶ = 23181966361 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 23181966425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 463639304 + ... + 463639353.

It is an arithmetic number, because the mean of its divisors is an integer number (4790939733).

Almost surely, 2^23181966425 is an apocalyptic number.

23181966425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23181966425 is a deficient number, since it is larger than the sum of its proper divisors (5563671973).

23181966425 is an equidigital number, since it uses as much as digits as its factorization.

23181966425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927278667 (or 927278662 counting only the distinct ones).

The product of its digits is 622080, while the sum is 47.

The spelling of 23181966425 in words is "twenty-three billion, one hundred eighty-one million, nine hundred sixty-six thousand, four hundred twenty-five".