21348843 has 8 divisors (see below), whose sum is σ = 29446800. Its totient is φ = 13741728.

The previous prime is 21348809. The next prime is 21348851. The reversal of 21348843 is 34884312.

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

It is not a de Polignac number, because 21348843 - 2¹⁰ = 21347819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21348883) 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 7 ways as a sum of consecutive naturals, for example, 122608 + ... + 122781.

It is an arithmetic number, because the mean of its divisors is an integer number (3680850).

Almost surely, 2^21348843 is an apocalyptic number.

21348843 is a deficient number, since it is larger than the sum of its proper divisors (8097957).

21348843 is a wasteful number, since it uses less digits than its factorization.

21348843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245421.

The product of its digits is 18432, while the sum is 33.

The square root of 21348843 is about 4620.4808191356. The cubic root of 21348843 is about 277.4117047230.

It can be divided in two parts, 213488 and 43, that added together give a triangular number (213531 = T₆₅₃).

The spelling of 21348843 in words is "twenty-one million, three hundred forty-eight thousand, eight hundred forty-three".