21417022 has 16 divisors (see below), whose sum is σ = 36255600. Its totient is φ = 9399040.

The previous prime is 21416999. The next prime is 21417023. The reversal of 21417022 is 22071412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21417023) 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, 16147 + ... + 17422.

It is an arithmetic number, because the mean of its divisors is an integer number (2265975).

Almost surely, 2^21417022 is an apocalyptic number.

21417022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21417022 is a deficient number, since it is larger than the sum of its proper divisors (14838578).

21417022 is a wasteful number, since it uses less digits than its factorization.

21417022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33611.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 21417022 is about 4627.8528498646. The cubic root of 21417022 is about 277.7067020404.

Adding to 21417022 its reverse (22071412), we get a palindrome (43488434).

The spelling of 21417022 in words is "twenty-one million, four hundred seventeen thousand, twenty-two".