23662809091 has 4 divisors (see below), whose sum is σ = 23962338400. Its totient is φ = 23363279784.

The previous prime is 23662809061. The next prime is 23662809109. The reversal of 23662809091 is 19090826632.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23662809091 - 2¹⁹ = 23662284803 is a prime.

It is a super-2 number, since 2×23662809091² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23662809011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149764536 + ... + 149764693.

It is an arithmetic number, because the mean of its divisors is an integer number (5990584600).

Almost surely, 2^23662809091 is an apocalyptic number.

23662809091 is a deficient number, since it is larger than the sum of its proper divisors (299529309).

23662809091 is an equidigital number, since it uses as much as digits as its factorization.

23662809091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299529308.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 23662809091 in words is "twenty-three billion, six hundred sixty-two million, eight hundred nine thousand, ninety-one".