21037222 has 8 divisors (see below), whose sum is σ = 31647816. Its totient is φ = 10487952.

The previous prime is 21037207. The next prime is 21037231. The reversal of 21037222 is 22273012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21037222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14463 + ... + 15850.

It is an arithmetic number, because the mean of its divisors is an integer number (3955977).

Almost surely, 2^21037222 is an apocalyptic number.

21037222 is a deficient number, since it is larger than the sum of its proper divisors (10610594).

21037222 is a wasteful number, since it uses less digits than its factorization.

21037222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30662.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 21037222 is about 4586.6351500855. The cubic root of 21037222 is about 276.0553256729.

The spelling of 21037222 in words is "twenty-one million, thirty-seven thousand, two hundred twenty-two".