21193294 has 8 divisors (see below), whose sum is σ = 31831128. Its totient is φ = 10582920.

The previous prime is 21193283. The next prime is 21193307. The reversal of 21193294 is 49239112.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4812 + ... + 8095.

It is an arithmetic number, because the mean of its divisors is an integer number (3978891).

Almost surely, 2^21193294 is an apocalyptic number.

21193294 is a deficient number, since it is larger than the sum of its proper divisors (10637834).

21193294 is a wasteful number, since it uses less digits than its factorization.

21193294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13730.

The product of its digits is 3888, while the sum is 31.

The square root of 21193294 is about 4603.6174906263. The cubic root of 21193294 is about 276.7363154273.

The spelling of 21193294 in words is "twenty-one million, one hundred ninety-three thousand, two hundred ninety-four".