21794330 has 32 divisors (see below), whose sum is σ = 41549760. Its totient is φ = 8208000.

The previous prime is 21794299. The next prime is 21794347. The reversal of 21794330 is 3349712.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21794293 and 21794302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47462 + ... + 47918.

It is an arithmetic number, because the mean of its divisors is an integer number (1298430).

Almost surely, 2^21794330 is an apocalyptic number.

21794330 is a deficient number, since it is larger than the sum of its proper divisors (19755430).

21794330 is a wasteful number, since it uses less digits than its factorization.

21794330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 21794330 is about 4668.4397821970. The cubic root of 21794330 is about 279.3280229540.

The spelling of 21794330 in words is "twenty-one million, seven hundred ninety-four thousand, three hundred thirty".