21922700 has 36 divisors (see below), whose sum is σ = 48741672. Its totient is φ = 8553600.

The previous prime is 21922699. The next prime is 21922709. The reversal of 21922700 is 722912.

It is not an unprimeable number, because it can be changed into a prime (21922709) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1427 + ... + 6773.

Almost surely, 2^21922700 is an apocalyptic number.

21922700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21922700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24370836).

21922700 is an abundant number, since it is smaller than the sum of its proper divisors (26818972).

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

21922700 is a wasteful number, since it uses less digits than its factorization.

21922700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5402 (or 5395 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 21922700 is about 4682.1683011186. The cubic root of 21922700 is about 279.8753697043.

It can be divided in two parts, 21922 and 700, that added together give a palindrome (22622).

The spelling of 21922700 in words is "twenty-one million, nine hundred twenty-two thousand, seven hundred".