22686493 has 2 divisors, whose sum is σ = 22686494. Its totient is φ = 22686492.

The previous prime is 22686481. The next prime is 22686523. The reversal of 22686493 is 39468622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22686169 + 324 = 4763^2 + 18^2 .

It is a cyclic number.

It is not a de Polignac number, because 22686493 - 2²¹ = 20589341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22686403) 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, 11343246 + 11343247.

It is an arithmetic number, because the mean of its divisors is an integer number (11343247).

Almost surely, 2^22686493 is an apocalyptic number.

It is an amenable number.

22686493 is a deficient number, since it is larger than the sum of its proper divisors (1).

22686493 is an equidigital number, since it uses as much as digits as its factorization.

22686493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 40.

The square root of 22686493 is about 4763.0340120558. The cubic root of 22686493 is about 283.0886485759.

The spelling of 22686493 in words is "twenty-two million, six hundred eighty-six thousand, four hundred ninety-three".