22730681 has 4 divisors (see below), whose sum is σ = 22757364. Its totient is φ = 22704000.

The previous prime is 22730677. The next prime is 22730711. The reversal of 22730681 is 18603722.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7645225 + 15085456 = 2765^2 + 3884^2 .

It is a cyclic number.

It is not a de Polignac number, because 22730681 - 2² = 22730677 is a prime.

It is a super-2 number, since 2×22730681² = 1033367717447522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22730611) 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, 12020 + ... + 13781.

It is an arithmetic number, because the mean of its divisors is an integer number (5689341).

Almost surely, 2^22730681 is an apocalyptic number.

It is an amenable number.

22730681 is a deficient number, since it is larger than the sum of its proper divisors (26683).

22730681 is an equidigital number, since it uses as much as digits as its factorization.

22730681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26682.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 22730681 is about 4767.6703954867. The cubic root of 22730681 is about 283.2723262729.

The spelling of 22730681 in words is "twenty-two million, seven hundred thirty thousand, six hundred eighty-one".