23691020091 has 8 divisors (see below), whose sum is σ = 31968605760. Its totient is φ = 15603723912.

The previous prime is 23691020081. The next prime is 23691020189. The reversal of 23691020091 is 19002019632.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23691020091 - 2¹⁵ = 23690987323 is a prime.

It is a super-2 number, since 2×23691020091² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23691020081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47572081 + ... + 47572578.

It is an arithmetic number, because the mean of its divisors is an integer number (3996075720).

Almost surely, 2^23691020091 is an apocalyptic number.

23691020091 is a deficient number, since it is larger than the sum of its proper divisors (8277585669).

23691020091 is an equidigital number, since it uses as much as digits as its factorization.

23691020091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95144745.

The product of its (nonzero) digits is 5832, while the sum is 33.

The spelling of 23691020091 in words is "twenty-three billion, six hundred ninety-one million, twenty thousand, ninety-one".