21373226 has 8 divisors (see below), whose sum is σ = 36639840. Its totient is φ = 9159948.

The previous prime is 21373223. The next prime is 21373237. The reversal of 21373226 is 62237312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21373195 and 21373204.

It is not an unprimeable number, because it can be changed into a prime (21373223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763316 + ... + 763343.

It is an arithmetic number, because the mean of its divisors is an integer number (4579980).

Almost surely, 2^21373226 is an apocalyptic number.

21373226 is a deficient number, since it is larger than the sum of its proper divisors (15266614).

21373226 is a wasteful number, since it uses less digits than its factorization.

21373226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526668.

The product of its digits is 3024, while the sum is 26.

The square root of 21373226 is about 4623.1186443785. The cubic root of 21373226 is about 277.5172772837.

The spelling of 21373226 in words is "twenty-one million, three hundred seventy-three thousand, two hundred twenty-six".