23785929991 has 2 divisors, whose sum is σ = 23785929992. Its totient is φ = 23785929990.

The previous prime is 23785929907. The next prime is 23785930031. The reversal of 23785929991 is 19992958732.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23785929991 - 2¹¹ = 23785927943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23785929691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11892964995 + 11892964996.

It is an arithmetic number, because the mean of its divisors is an integer number (11892964996).

Almost surely, 2^23785929991 is an apocalyptic number.

23785929991 is a deficient number, since it is larger than the sum of its proper divisors (1).

23785929991 is an equidigital number, since it uses as much as digits as its factorization.

23785929991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22044960, while the sum is 64.

The spelling of 23785929991 in words is "twenty-three billion, seven hundred eighty-five million, nine hundred twenty-nine thousand, nine hundred ninety-one".