22121984 has 20 divisors (see below), whose sum is σ = 44201784. Its totient is φ = 11060736.

The previous prime is 22121963. The next prime is 22121987. The reversal of 22121984 is 48912122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21092 + ... + 22115.

Almost surely, 2^22121984 is an apocalyptic number.

It is an amenable number.

22121984 is a deficient number, since it is larger than the sum of its proper divisors (22079800).

22121984 is an frugal number, since it uses more digits than its factorization.

22121984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43225 (or 43209 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 22121984 is about 4703.4013224474. The cubic root of 22121984 is about 280.7208636231.

The spelling of 22121984 in words is "twenty-two million, one hundred twenty-one thousand, nine hundred eighty-four".