21370022 has 16 divisors (see below), whose sum is σ = 33864000. Its totient is φ = 10086120.

The previous prime is 21370021. The next prime is 21370031. The reversal of 21370022 is 22007312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21370021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11729 + ... + 13427.

It is an arithmetic number, because the mean of its divisors is an integer number (2116500).

Almost surely, 2^21370022 is an apocalyptic number.

21370022 is a deficient number, since it is larger than the sum of its proper divisors (12493978).

21370022 is a wasteful number, since it uses less digits than its factorization.

21370022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051.

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

The square root of 21370022 is about 4622.7721120557. The cubic root of 21370022 is about 277.5034093134.

Adding to 21370022 its reverse (22007312), we get a palindrome (43377334).

The spelling of 21370022 in words is "twenty-one million, three hundred seventy thousand, twenty-two".