21843074 has 8 divisors (see below), whose sum is σ = 35743248. Its totient is φ = 9928660.

The previous prime is 21843053. The next prime is 21843121. The reversal of 21843074 is 47034812.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496412 + ... + 496455.

It is an arithmetic number, because the mean of its divisors is an integer number (4467906).

Almost surely, 2^21843074 is an apocalyptic number.

21843074 is a deficient number, since it is larger than the sum of its proper divisors (13900174).

21843074 is a wasteful number, since it uses less digits than its factorization.

21843074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992880.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 21843074 is about 4673.6574542857. The cubic root of 21843074 is about 279.5361111301.

Adding to 21843074 its reverse (47034812), we get a palindrome (68877886).

The spelling of 21843074 in words is "twenty-one million, eight hundred forty-three thousand, seventy-four".