22506136 has 8 divisors (see below), whose sum is σ = 42199020. Its totient is φ = 11253064.

The previous prime is 22506109. The next prime is 22506149. The reversal of 22506136 is 63160522.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 22506136.

It is a congruent number.

It is an unprimeable number.

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, 1406626 + ... + 1406641.

Almost surely, 2^22506136 is an apocalyptic number.

It is an amenable number.

22506136 is a deficient number, since it is larger than the sum of its proper divisors (19692884).

22506136 is a wasteful number, since it uses less digits than its factorization.

22506136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813273 (or 2813269 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 22506136 is about 4744.0632373526. The cubic root of 22506136 is about 282.3364694299.

Adding to 22506136 its reverse (63160522), we get a palindrome (85666658).

The spelling of 22506136 in words is "twenty-two million, five hundred six thousand, one hundred thirty-six".