22121774 has 16 divisors (see below), whose sum is σ = 33820368. Its totient is φ = 10850112.

The previous prime is 22121767. The next prime is 22121779. The reversal of 22121774 is 47712122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121779) 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, 40169 + ... + 40715.

It is an arithmetic number, because the mean of its divisors is an integer number (2113773).

Almost surely, 2^22121774 is an apocalyptic number.

22121774 is a deficient number, since it is larger than the sum of its proper divisors (11698594).

22121774 is a wasteful number, since it uses less digits than its factorization.

22121774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899.

The product of its digits is 1568, while the sum is 26.

The square root of 22121774 is about 4703.3789981246. The cubic root of 22121774 is about 280.7199753428.

Adding to 22121774 its reverse (47712122), we get a palindrome (69833896).

The spelling of 22121774 in words is "twenty-two million, one hundred twenty-one thousand, seven hundred seventy-four".