22927381 has 2 divisors, whose sum is σ = 22927382. Its totient is φ = 22927380.

The previous prime is 22927369. The next prime is 22927403. The reversal of 22927381 is 18372922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12744900 + 10182481 = 3570^2 + 3191^2 .

It is a cyclic number.

It is not a de Polignac number, because 22927381 - 2⁵ = 22927349 is a prime.

It is a super-2 number, since 2×22927381² = 1051329599038322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22927351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11463690 + 11463691.

It is an arithmetic number, because the mean of its divisors is an integer number (11463691).

Almost surely, 2^22927381 is an apocalyptic number.

22927381 is the 2765-th hex number.

It is an amenable number.

22927381 is a deficient number, since it is larger than the sum of its proper divisors (1).

22927381 is an equidigital number, since it uses as much as digits as its factorization.

22927381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 22927381 is about 4788.2544836297. The cubic root of 22927381 is about 284.0870798565.

The spelling of 22927381 in words is "twenty-two million, nine hundred twenty-seven thousand, three hundred eighty-one".