22121853 has 16 divisors (see below), whose sum is σ = 31940160. Its totient is φ = 13538304.

The previous prime is 22121849. The next prime is 22121857. The reversal of 22121853 is 35812122.

It is an interprime number because it is at equal distance from previous prime (22121849) and next prime (22121857).

It is not a de Polignac number, because 22121853 - 2² = 22121849 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6058 + ... + 8996.

It is an arithmetic number, because the mean of its divisors is an integer number (1996260).

Almost surely, 2^22121853 is an apocalyptic number.

It is an amenable number.

22121853 is a deficient number, since it is larger than the sum of its proper divisors (9818307).

22121853 is a wasteful number, since it uses less digits than its factorization.

22121853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148.

The product of its digits is 960, while the sum is 24.

The square root of 22121853 is about 4703.3873963347. The cubic root of 22121853 is about 280.7203095060.

Adding to 22121853 its reverse (35812122), we get a palindrome (57933975).

The spelling of 22121853 in words is "twenty-two million, one hundred twenty-one thousand, eight hundred fifty-three".