21794029 has 6 divisors (see below), whose sum is σ = 21977774. Its totient is φ = 21611160.

The previous prime is 21794027. The next prime is 21794039. The reversal of 21794029 is 92049712.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12040900 + 9753129 = 3470^2 + 3123^2 .

It is not a de Polignac number, because 21794029 - 2¹ = 21794027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21793985 and 21794003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21794027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62634 + ... + 62980.

Almost surely, 2^21794029 is an apocalyptic number.

It is an amenable number.

21794029 is a deficient number, since it is larger than the sum of its proper divisors (183745).

21794029 is an frugal number, since it uses more digits than its factorization.

21794029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 21794029 is about 4668.4075443346. The cubic root of 21794029 is about 279.3267370214.

The spelling of 21794029 in words is "twenty-one million, seven hundred ninety-four thousand, twenty-nine".