21794793 has 8 divisors (see below), whose sum is σ = 29678208. Its totient is φ = 14220624.

The previous prime is 21794789. The next prime is 21794803. The reversal of 21794793 is 39749712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21794793 - 2² = 21794789 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21794743) 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, 77146 + ... + 77427.

It is an arithmetic number, because the mean of its divisors is an integer number (3709776).

Almost surely, 2^21794793 is an apocalyptic number.

It is an amenable number.

21794793 is a deficient number, since it is larger than the sum of its proper divisors (7883415).

21794793 is a wasteful number, since it uses less digits than its factorization.

21794793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154623.

The product of its digits is 95256, while the sum is 42.

The square root of 21794793 is about 4668.4893702353. The cubic root of 21794793 is about 279.3300009602.

The spelling of 21794793 in words is "twenty-one million, seven hundred ninety-four thousand, seven hundred ninety-three".