23989909791 has 16 divisors (see below), whose sum is σ = 32777273088. Its totient is φ = 15598161600.

The previous prime is 23989909777. The next prime is 23989909807. The reversal of 23989909791 is 19790998932.

It is not a de Polignac number, because 23989909791 - 2⁷ = 23989909663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23989909991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372520 + ... + 432146.

It is an arithmetic number, because the mean of its divisors is an integer number (2048579568).

Almost surely, 2^23989909791 is an apocalyptic number.

23989909791 is a deficient number, since it is larger than the sum of its proper divisors (8787363297).

23989909791 is a wasteful number, since it uses less digits than its factorization.

23989909791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62942.

The product of its (nonzero) digits is 19840464, while the sum is 66.

The spelling of 23989909791 in words is "twenty-three billion, nine hundred eighty-nine million, nine hundred nine thousand, seven hundred ninety-one".