21035363 has 4 divisors (see below), whose sum is σ = 21949968. Its totient is φ = 20120760.

The previous prime is 21035359. The next prime is 21035389. The reversal of 21035363 is 36353012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21035363 - 2² = 21035359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 914581 = 21035363 / (2 + 1 + 0 + 3 + 5 + 3 + 6 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21035303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457268 + ... + 457313.

It is an arithmetic number, because the mean of its divisors is an integer number (5487492).

Almost surely, 2^21035363 is an apocalyptic number.

21035363 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21035363 is a deficient number, since it is larger than the sum of its proper divisors (914605).

21035363 is an equidigital number, since it uses as much as digits as its factorization.

21035363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914604.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 21035363 is about 4586.4324915995. The cubic root of 21035363 is about 276.0471940231.

Adding to 21035363 its reverse (36353012), we get a palindrome (57388375).

The spelling of 21035363 in words is "twenty-one million, thirty-five thousand, three hundred sixty-three".