22797021 has 16 divisors (see below), whose sum is σ = 33433344. Its totient is φ = 13729344.

The previous prime is 22797007. The next prime is 22797031. The reversal of 22797021 is 12079722.

It is a happy number.

It is not a de Polignac number, because 22797021 - 2⁵ = 22796989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22797021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22797031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4386 + ... + 8051.

It is an arithmetic number, because the mean of its divisors is an integer number (2089584).

Almost surely, 2^22797021 is an apocalyptic number.

It is an amenable number.

22797021 is a deficient number, since it is larger than the sum of its proper divisors (10636323).

22797021 is a wasteful number, since it uses less digits than its factorization.

22797021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12500.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 22797021 is about 4774.6226028871. The cubic root of 22797021 is about 283.5476374820.

The spelling of 22797021 in words is "twenty-two million, seven hundred ninety-seven thousand, twenty-one".