21873334 has 8 divisors (see below), whose sum is σ = 37497168. Its totient is φ = 9374280.

The previous prime is 21873331. The next prime is 21873343. The reversal of 21873334 is 43337812.

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

It is a junction number, because it is equal to n+sod(n) for n = 21873296 and 21873305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21873331) 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 3 ways as a sum of consecutive naturals, for example, 781177 + ... + 781204.

It is an arithmetic number, because the mean of its divisors is an integer number (4687146).

Almost surely, 2^21873334 is an apocalyptic number.

21873334 is a deficient number, since it is larger than the sum of its proper divisors (15623834).

21873334 is a wasteful number, since it uses less digits than its factorization.

21873334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562390.

The product of its digits is 12096, while the sum is 31.

The square root of 21873334 is about 4676.8936271846. The cubic root of 21873334 is about 279.6651353943.

The spelling of 21873334 in words is "twenty-one million, eight hundred seventy-three thousand, three hundred thirty-four".