23023720637 has 4 divisors (see below), whose sum is σ = 23048033856. Its totient is φ = 22999407420.

The previous prime is 23023720633. The next prime is 23023720663. The reversal of 23023720637 is 73602732032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23023720637 - 2² = 23023720633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23023720597 and 23023720606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23023720633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12155189 + ... + 12157082.

It is an arithmetic number, because the mean of its divisors is an integer number (5762008464).

Almost surely, 2^23023720637 is an apocalyptic number.

It is an amenable number.

23023720637 is a deficient number, since it is larger than the sum of its proper divisors (24313219).

23023720637 is an equidigital number, since it uses as much as digits as its factorization.

23023720637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24313218.

The product of its (nonzero) digits is 63504, while the sum is 35.

The spelling of 23023720637 in words is "twenty-three billion, twenty-three million, seven hundred twenty thousand, six hundred thirty-seven".