22731328687 has 2 divisors, whose sum is σ = 22731328688. Its totient is φ = 22731328686.

The previous prime is 22731328603. The next prime is 22731328723. The reversal of 22731328687 is 78682313722.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22731328687 - 2¹⁹ = 22730804399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22731328687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22731323687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11365664343 + 11365664344.

It is an arithmetic number, because the mean of its divisors is an integer number (11365664344).

Almost surely, 2^22731328687 is an apocalyptic number.

22731328687 is a deficient number, since it is larger than the sum of its proper divisors (1).

22731328687 is an equidigital number, since it uses as much as digits as its factorization.

22731328687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 49.

The spelling of 22731328687 in words is "twenty-two billion, seven hundred thirty-one million, three hundred twenty-eight thousand, six hundred eighty-seven".