21194210 has 16 divisors (see below), whose sum is σ = 38688192. Its totient is φ = 8358000.

The previous prime is 21194203. The next prime is 21194213. The reversal of 21194210 is 1249112.

It is not an unprimeable number, because it can be changed into a prime (21194213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14216 + ... + 15635.

It is an arithmetic number, because the mean of its divisors is an integer number (2418012).

Almost surely, 2^21194210 is an apocalyptic number.

21194210 is a deficient number, since it is larger than the sum of its proper divisors (17493982).

21194210 is a wasteful number, since it uses less digits than its factorization.

21194210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29929.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 21194210 is about 4603.7169765310. The cubic root of 21194210 is about 276.7403023302.

The spelling of 21194210 in words is "twenty-one million, one hundred ninety-four thousand, two hundred ten".