22037021 has 4 divisors (see below), whose sum is σ = 22338972. Its totient is φ = 21735072.

The previous prime is 22037009. The next prime is 22037039. The reversal of 22037021 is 12073022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3880900 + 18156121 = 1970^2 + 4261^2 .

It is a cyclic number.

It is not a de Polignac number, because 22037021 - 2⁶ = 22036957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22037221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150866 + ... + 151011.

It is an arithmetic number, because the mean of its divisors is an integer number (5584743).

Almost surely, 2^22037021 is an apocalyptic number.

It is an amenable number.

22037021 is a deficient number, since it is larger than the sum of its proper divisors (301951).

22037021 is an equidigital number, since it uses as much as digits as its factorization.

22037021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301950.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 22037021 is about 4694.3605528336. The cubic root of 22037021 is about 280.3610181645.

The spelling of 22037021 in words is "twenty-two million, thirty-seven thousand, twenty-one".