23242221637 has 4 divisors (see below), whose sum is σ = 24465496480. Its totient is φ = 22018946796.

The previous prime is 23242221589. The next prime is 23242221641. The reversal of 23242221637 is 73612224232.

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 a de Polignac number, because none of the positive numbers 2^k-23242221637 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 (23242224637) 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, 611637393 + ... + 611637430.

It is an arithmetic number, because the mean of its divisors is an integer number (6116374120).

Almost surely, 2^23242221637 is an apocalyptic number.

It is an amenable number.

23242221637 is a deficient number, since it is larger than the sum of its proper divisors (1223274843).

23242221637 is a wasteful number, since it uses less digits than its factorization.

23242221637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223274842.

The product of its digits is 48384, while the sum is 34.

Adding to 23242221637 its reverse (73612224232), we get a palindrome (96854445869).

The spelling of 23242221637 in words is "twenty-three billion, two hundred forty-two million, two hundred twenty-one thousand, six hundred thirty-seven".