23773720631 has 4 divisors (see below), whose sum is σ = 23791746000. Its totient is φ = 23755695264.

The previous prime is 23773720583. The next prime is 23773720781. The reversal of 23773720631 is 13602737732.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23773720631 is a prime.

It is a super-2 number, since 2×23773720631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23773729631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9010706 + ... + 9013343.

It is an arithmetic number, because the mean of its divisors is an integer number (5947936500).

Almost surely, 2^23773720631 is an apocalyptic number.

23773720631 is a deficient number, since it is larger than the sum of its proper divisors (18025369).

23773720631 is a wasteful number, since it uses less digits than its factorization.

23773720631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18025368.

The product of its (nonzero) digits is 222264, while the sum is 41.

The spelling of 23773720631 in words is "twenty-three billion, seven hundred seventy-three million, seven hundred twenty thousand, six hundred thirty-one".