21035343 has 8 divisors (see below), whose sum is σ = 32053888. Its totient is φ = 12020184.

The previous prime is 21035327. The next prime is 21035359. The reversal of 21035343 is 34353012.

It is an interprime number because it is at equal distance from previous prime (21035327) and next prime (21035359).

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

It is not a de Polignac number, because 21035343 - 2⁴ = 21035327 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1001683 = 21035343 / (2 + 1 + 0 + 3 + 5 + 3 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035303) 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, 500821 + ... + 500862.

It is an arithmetic number, because the mean of its divisors is an integer number (4006736).

Almost surely, 2^21035343 is an apocalyptic number.

21035343 is a deficient number, since it is larger than the sum of its proper divisors (11018545).

21035343 is a wasteful number, since it uses less digits than its factorization.

21035343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001693.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 21035343 is about 4586.4303112551. The cubic root of 21035343 is about 276.0471065364.

Adding to 21035343 its reverse (34353012), we get a palindrome (55388355).

It can be divided in two parts, 210 and 35343, that added together give a palindrome (35553).

The spelling of 21035343 in words is "twenty-one million, thirty-five thousand, three hundred forty-three".