23761427909 has 2 divisors, whose sum is σ = 23761427910. Its totient is φ = 23761427908.

The previous prime is 23761427897. The next prime is 23761427923. The reversal of 23761427909 is 90972416732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18829877284 + 4931550625 = 137222^2 + 70225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23761427909 is a prime.

It is a super-2 number, since 2×23761427909² (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 (23761427999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11880713954 + 11880713955.

It is an arithmetic number, because the mean of its divisors is an integer number (11880713955).

Almost surely, 2^23761427909 is an apocalyptic number.

It is an amenable number.

23761427909 is a deficient number, since it is larger than the sum of its proper divisors (1).

23761427909 is an equidigital number, since it uses as much as digits as its factorization.

23761427909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The spelling of 23761427909 in words is "twenty-three billion, seven hundred sixty-one million, four hundred twenty-seven thousand, nine hundred nine".