22948021 has 4 divisors (see below), whose sum is σ = 22977612. Its totient is φ = 22918432.

The previous prime is 22948001. The next prime is 22948049. The reversal of 22948021 is 12084922.

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 8614225 + 14333796 = 2935^2 + 3786^2 .

It is a cyclic number.

It is not a de Polignac number, because 22948021 - 2⁵ = 22947989 is a prime.

It is a super-2 number, since 2×22948021² = 1053223335632882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22948001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13600 + ... + 15193.

It is an arithmetic number, because the mean of its divisors is an integer number (5744403).

Almost surely, 2^22948021 is an apocalyptic number.

It is an amenable number.

22948021 is a deficient number, since it is larger than the sum of its proper divisors (29591).

22948021 is an equidigital number, since it uses as much as digits as its factorization.

22948021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29590.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 22948021 is about 4790.4092727031. The cubic root of 22948021 is about 284.1723025382.

The spelling of 22948021 in words is "twenty-two million, nine hundred forty-eight thousand, twenty-one".