22536387 has 10 divisors (see below), whose sum is σ = 33665588. Its totient is φ = 15024204.

The previous prime is 22536361. The next prime is 22536391. The reversal of 22536387 is 78363522.

It is not a de Polignac number, because 22536387 - 2⁷ = 22536259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22536307) 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 in 9 ways as a sum of consecutive naturals, for example, 139033 + ... + 139194.

Almost surely, 2^22536387 is an apocalyptic number.

22536387 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

22536387 is a deficient number, since it is larger than the sum of its proper divisors (11129201).

22536387 is an equidigital number, since it uses as much as digits as its factorization.

22536387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278239 (or 278230 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 22536387 is about 4747.2504673758. The cubic root of 22536387 is about 282.4629110470.

The spelling of 22536387 in words is "twenty-two million, five hundred thirty-six thousand, three hundred eighty-seven".