21373606 has 8 divisors (see below), whose sum is σ = 32087160. Its totient is φ = 10677888.

The previous prime is 21373591. The next prime is 21373657. The reversal of 21373606 is 60637312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 891 + ... + 6598.

It is an arithmetic number, because the mean of its divisors is an integer number (4010895).

Almost surely, 2^21373606 is an apocalyptic number.

21373606 is a deficient number, since it is larger than the sum of its proper divisors (10713554).

21373606 is a wasteful number, since it uses less digits than its factorization.

21373606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8918.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 21373606 is about 4623.1597419946. The cubic root of 21373606 is about 277.5189219573.

The spelling of 21373606 in words is "twenty-one million, three hundred seventy-three thousand, six hundred six".