21794071 has 6 divisors (see below), whose sum is σ = 23599680. Its totient is φ = 20117448.

The previous prime is 21794039. The next prime is 21794107. The reversal of 21794071 is 17049712.

It is not a de Polignac number, because 21794071 - 2⁵ = 21794039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21794471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64311 + ... + 64648.

It is an arithmetic number, because the mean of its divisors is an integer number (3933280).

Almost surely, 2^21794071 is an apocalyptic number.

21794071 is a deficient number, since it is larger than the sum of its proper divisors (1805609).

21794071 is a wasteful number, since it uses less digits than its factorization.

21794071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128985 (or 128972 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 21794071 is about 4668.4120426543. The cubic root of 21794071 is about 279.3269164545.

The spelling of 21794071 in words is "twenty-one million, seven hundred ninety-four thousand, seventy-one".