22681900 has 18 divisors (see below), whose sum is σ = 49219940. Its totient is φ = 9072720.

The previous prime is 22681849. The next prime is 22681931. The reversal of 22681900 is 918622.

It is a happy number.

It is a super-2 number, since 2×22681900² = 1028937175220000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113310 + ... + 113509.

Almost surely, 2^22681900 is an apocalyptic number.

22681900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22681900 is an abundant number, since it is smaller than the sum of its proper divisors (26538040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22681900 is a wasteful number, since it uses less digits than its factorization.

22681900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226833 (or 226826 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 22681900 is about 4762.5518369882. The cubic root of 22681900 is about 283.0695430238.

The spelling of 22681900 in words is "twenty-two million, six hundred eighty-one thousand, nine hundred".