22724621687 has 4 divisors (see below), whose sum is σ = 22890494976. Its totient is φ = 22558748400.

The previous prime is 22724621677. The next prime is 22724621723. The reversal of 22724621687 is 78612642722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78612642722 = 2 ⋅39306321361.

It is a cyclic number.

It is not a de Polignac number, because 22724621687 - 2⁴ = 22724621671 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 (22724621617) 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, 82936439 + ... + 82936712.

It is an arithmetic number, because the mean of its divisors is an integer number (5722623744).

Almost surely, 2^22724621687 is an apocalyptic number.

22724621687 is a deficient number, since it is larger than the sum of its proper divisors (165873289).

22724621687 is a wasteful number, since it uses less digits than its factorization.

22724621687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165873288.

The product of its digits is 903168, while the sum is 47.

The spelling of 22724621687 in words is "twenty-two billion, seven hundred twenty-four million, six hundred twenty-one thousand, six hundred eighty-seven".