21794271 has 24 divisors (see below), whose sum is σ = 31428096. Its totient is φ = 13419120.

The previous prime is 21794261. The next prime is 21794287. The reversal of 21794271 is 17249712.

It is not a de Polignac number, because 21794271 - 2⁵ = 21794239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21794261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48976 + ... + 49418.

It is an arithmetic number, because the mean of its divisors is an integer number (1309504).

Almost surely, 2^21794271 is an apocalyptic number.

21794271 is a deficient number, since it is larger than the sum of its proper divisors (9633825).

21794271 is a wasteful number, since it uses less digits than its factorization.

21794271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 500 counting only the distinct ones).

The product of its digits is 7056, while the sum is 33.

The square root of 21794271 is about 4668.4334631651. The cubic root of 21794271 is about 279.3277708951.

The spelling of 21794271 in words is "twenty-one million, seven hundred ninety-four thousand, two hundred seventy-one".