22039900 has 18 divisors (see below), whose sum is σ = 47826800. Its totient is φ = 8815920.

The previous prime is 22039879. The next prime is 22039907. The reversal of 22039900 is 993022.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22039907) 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 5 ways as a sum of consecutive naturals, for example, 110100 + ... + 110299.

Almost surely, 2^22039900 is an apocalyptic number.

22039900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22039900 is an abundant number, since it is smaller than the sum of its proper divisors (25786900).

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

22039900 is a wasteful number, since it uses less digits than its factorization.

22039900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220413 (or 220406 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 22039900 is about 4694.6671873520. The cubic root of 22039900 is about 280.3732267751.

The spelling of 22039900 in words is "twenty-two million, thirty-nine thousand, nine hundred".