22905021 has 8 divisors (see below), whose sum is σ = 30562560. Its totient is φ = 15258752.

The previous prime is 22905017. The next prime is 22905049. The reversal of 22905021 is 12050922.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22905021 - 2² = 22905017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22905011) 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 7 ways as a sum of consecutive naturals, for example, 5140 + ... + 8498.

It is an arithmetic number, because the mean of its divisors is an integer number (3820320).

Almost surely, 2^22905021 is an apocalyptic number.

It is an amenable number.

22905021 is a deficient number, since it is larger than the sum of its proper divisors (7657539).

22905021 is a wasteful number, since it uses less digits than its factorization.

22905021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5635.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 22905021 is about 4785.9190339996. The cubic root of 22905021 is about 283.9946975470.

Adding to 22905021 its reverse (12050922), we get a palindrome (34955943).

The spelling of 22905021 in words is "twenty-two million, nine hundred five thousand, twenty-one".