21410206 has 4 divisors (see below), whose sum is σ = 32115312. Its totient is φ = 10705102.

The previous prime is 21410189. The next prime is 21410219. The reversal of 21410206 is 60201412.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21410206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5352550 + ... + 5352553.

It is an arithmetic number, because the mean of its divisors is an integer number (8028828).

Almost surely, 2^21410206 is an apocalyptic number.

21410206 is a deficient number, since it is larger than the sum of its proper divisors (10705106).

21410206 is a wasteful number, since it uses less digits than its factorization.

21410206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10705105.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 21410206 is about 4627.1163806414. The cubic root of 21410206 is about 277.6772387204.

Adding to 21410206 its reverse (60201412), we get a palindrome (81611618).

The spelling of 21410206 in words is "twenty-one million, four hundred ten thousand, two hundred six".