23440373989 has 2 divisors, whose sum is σ = 23440373990. Its totient is φ = 23440373988.

The previous prime is 23440373963. The next prime is 23440374019. The reversal of 23440373989 is 98937304432.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21041823364 + 2398550625 = 145058^2 + 48975^2 .

It is a cyclic number.

It is not a de Polignac number, because 23440373989 - 2⁷ = 23440373861 is a prime.

It is a super-2 number, since 2×23440373989² (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 (23440373189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11720186994 + 11720186995.

It is an arithmetic number, because the mean of its divisors is an integer number (11720186995).

Almost surely, 2^23440373989 is an apocalyptic number.

It is an amenable number.

23440373989 is a deficient number, since it is larger than the sum of its proper divisors (1).

23440373989 is an equidigital number, since it uses as much as digits as its factorization.

23440373989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 23440373989 in words is "twenty-three billion, four hundred forty million, three hundred seventy-three thousand, nine hundred eighty-nine".