23726634989 has 6 divisors (see below), whose sum is σ = 23887767150. Its totient is φ = 23565528216.

The previous prime is 23726634979. The next prime is 23726635001. The reversal of 23726634989 is 98943662732.

It can be written as a sum of positive squares in only one way, i.e., 15923916100 + 7802718889 = 126190^2 + 88333^2 .

It is not a de Polignac number, because 23726634989 - 2⁸ = 23726634733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23726634949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1873922 + ... + 1886540.

It is an arithmetic number, because the mean of its divisors is an integer number (3981294525).

Almost surely, 2^23726634989 is an apocalyptic number.

It is an amenable number.

23726634989 is a deficient number, since it is larger than the sum of its proper divisors (161132161).

23726634989 is an frugal number, since it uses more digits than its factorization.

23726634989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25387 (or 12768 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 59.

The spelling of 23726634989 in words is "twenty-three billion, seven hundred twenty-six million, six hundred thirty-four thousand, nine hundred eighty-nine".