21376206 has 12 divisors (see below), whose sum is σ = 46315152. Its totient is φ = 7125396.

The previous prime is 21376193. The next prime is 21376217. The reversal of 21376206 is 60267312.

It is a happy number.

21376206 is a `hidden beast` number, since 2 + 1 + 37 + 620 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21376206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 593766 + ... + 593801.

It is an arithmetic number, because the mean of its divisors is an integer number (3859596).

Almost surely, 2^21376206 is an apocalyptic number.

21376206 is an abundant number, since it is smaller than the sum of its proper divisors (24938946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21376206 is a wasteful number, since it uses less digits than its factorization.

21376206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187575 (or 1187572 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 21376206 is about 4623.4409264097. The cubic root of 21376206 is about 277.5301744641.

The spelling of 21376206 in words is "twenty-one million, three hundred seventy-six thousand, two hundred six".