21294683 has 4 divisors (see below), whose sum is σ = 21348720. Its totient is φ = 21240648.

The previous prime is 21294653. The next prime is 21294709. The reversal of 21294683 is 38649212.

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

It is a cyclic number.

It is not a de Polignac number, because 21294683 - 2¹⁰ = 21293659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21294653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26423 + ... + 27216.

It is an arithmetic number, because the mean of its divisors is an integer number (5337180).

Almost surely, 2^21294683 is an apocalyptic number.

21294683 is a deficient number, since it is larger than the sum of its proper divisors (54037).

21294683 is an equidigital number, since it uses as much as digits as its factorization.

21294683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54036.

The product of its digits is 20736, while the sum is 35.

The square root of 21294683 is about 4614.6162353981. The cubic root of 21294683 is about 277.1769169609.

The spelling of 21294683 in words is "twenty-one million, two hundred ninety-four thousand, six hundred eighty-three".