22720687 has 8 divisors (see below), whose sum is σ = 26244432. Its totient is φ = 19440000.

The previous prime is 22720679. The next prime is 22720741. The reversal of 22720687 is 78602722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22720687 - 2³ = 22720679 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 (22721687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60564 + ... + 60937.

It is an arithmetic number, because the mean of its divisors is an integer number (3280554).

Almost surely, 2^22720687 is an apocalyptic number.

22720687 is a deficient number, since it is larger than the sum of its proper divisors (3523745).

22720687 is a wasteful number, since it uses less digits than its factorization.

22720687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121529.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 22720687 is about 4766.6221792796. The cubic root of 22720687 is about 283.2308047330.

The spelling of 22720687 in words is "twenty-two million, seven hundred twenty thousand, six hundred eighty-seven".