22902021 has 24 divisors (see below), whose sum is σ = 34769280. Its totient is φ = 15062112.

The previous prime is 22902013. The next prime is 22902029. The reversal of 22902021 is 12020922.

It is an interprime number because it is at equal distance from previous prime (22902013) and next prime (22902029).

It is not a de Polignac number, because 22902021 - 2³ = 22902013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22901985 and 22902003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22902029) 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 23 ways as a sum of consecutive naturals, for example, 18601 + ... + 19793.

It is an arithmetic number, because the mean of its divisors is an integer number (1448720).

Almost surely, 2^22902021 is an apocalyptic number.

It is an amenable number.

22902021 is a deficient number, since it is larger than the sum of its proper divisors (11867259).

22902021 is an equidigital number, since it uses as much as digits as its factorization.

22902021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287 (or 1275 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 22902021 is about 4785.6056043097. The cubic root of 22902021 is about 283.9822982090.

Adding to 22902021 its reverse (12020922), we get a palindrome (34922943).

The spelling of 22902021 in words is "twenty-two million, nine hundred two thousand, twenty-one".