22021594 has 16 divisors (see below), whose sum is σ = 38969856. Its totient is φ = 9133200.

The previous prime is 22021591. The next prime is 22021621. The reversal of 22021594 is 49512022.

It is not an unprimeable number, because it can be changed into a prime (22021591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24937 + ... + 25804.

It is an arithmetic number, because the mean of its divisors is an integer number (2435616).

Almost surely, 2^22021594 is an apocalyptic number.

22021594 is a deficient number, since it is larger than the sum of its proper divisors (16948262).

22021594 is a wasteful number, since it uses less digits than its factorization.

22021594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50781.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 22021594 is about 4692.7171233732. The cubic root of 22021594 is about 280.2955807189.

The spelling of 22021594 in words is "twenty-two million, twenty-one thousand, five hundred ninety-four".