21103294 has 4 divisors (see below), whose sum is σ = 31654944. Its totient is φ = 10551646.

The previous prime is 21103267. The next prime is 21103301. The reversal of 21103294 is 49230112.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275822 + ... + 5275825.

It is an arithmetic number, because the mean of its divisors is an integer number (7913736).

Almost surely, 2^21103294 is an apocalyptic number.

21103294 is a deficient number, since it is larger than the sum of its proper divisors (10551650).

21103294 is a wasteful number, since it uses less digits than its factorization.

21103294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10551649.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 21103294 is about 4593.8321693331. The cubic root of 21103294 is about 276.3440276959.

The spelling of 21103294 in words is "twenty-one million, one hundred three thousand, two hundred ninety-four".