23728594381 has 2 divisors, whose sum is σ = 23728594382. Its totient is φ = 23728594380.

The previous prime is 23728594343. The next prime is 23728594387. The reversal of 23728594381 is 18349582732.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15818092900 + 7910501481 = 125770^2 + 88941^2 .

It is a cyclic number.

It is not a de Polignac number, because 23728594381 - 2⁹ = 23728593869 is a prime.

It is a super-2 number, since 2×23728594381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23728594387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11864297190 + 11864297191.

It is an arithmetic number, because the mean of its divisors is an integer number (11864297191).

Almost surely, 2^23728594381 is an apocalyptic number.

It is an amenable number.

23728594381 is a deficient number, since it is larger than the sum of its proper divisors (1).

23728594381 is an equidigital number, since it uses as much as digits as its factorization.

23728594381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 52.

The spelling of 23728594381 in words is "twenty-three billion, seven hundred twenty-eight million, five hundred ninety-four thousand, three hundred eighty-one".