23181919073 has 2 divisors, whose sum is σ = 23181919074. Its totient is φ = 23181919072.

The previous prime is 23181919069. The next prime is 23181919147. The reversal of 23181919073 is 37091918132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22671927184 + 509991889 = 150572^2 + 22583^2 .

It is a cyclic number.

It is not a de Polignac number, because 23181919073 - 2² = 23181919069 is a prime.

It is not a weakly prime, because it can be changed into another prime (23181919063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11590959536 + 11590959537.

It is an arithmetic number, because the mean of its divisors is an integer number (11590959537).

Almost surely, 2^23181919073 is an apocalyptic number.

It is an amenable number.

23181919073 is a deficient number, since it is larger than the sum of its proper divisors (1).

23181919073 is an equidigital number, since it uses as much as digits as its factorization.

23181919073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 23181919073 in words is "twenty-three billion, one hundred eighty-one million, nine hundred nineteen thousand, seventy-three".