23662489991 has 12 divisors (see below), whose sum is σ = 27529112160. Its totient is φ = 20279659680.

The previous prime is 23662489987. The next prime is 23662490017. The reversal of 23662489991 is 19998426632.

It is not a de Polignac number, because 23662489991 - 2² = 23662489987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23662489991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23662489691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 457571 + ... + 506651.

It is an arithmetic number, because the mean of its divisors is an integer number (2294092680).

Almost surely, 2^23662489991 is an apocalyptic number.

23662489991 is a deficient number, since it is larger than the sum of its proper divisors (3866622169).

23662489991 is an equidigital number, since it uses as much as digits as its factorization.

23662489991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58934 (or 58927 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 59.

The spelling of 23662489991 in words is "twenty-three billion, six hundred sixty-two million, four hundred eighty-nine thousand, nine hundred ninety-one".