21035163 has 4 divisors (see below), whose sum is σ = 28046888. Its totient is φ = 14023440.

The previous prime is 21035159. The next prime is 21035167. The reversal of 21035163 is 36153012.

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

It is an interprime number because it is at equal distance from previous prime (21035159) and next prime (21035167).

It is not a de Polignac number, because 21035163 - 2² = 21035159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21035167) 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, 3505858 + ... + 3505863.

It is an arithmetic number, because the mean of its divisors is an integer number (7011722).

Almost surely, 2^21035163 is an apocalyptic number.

21035163 is a deficient number, since it is larger than the sum of its proper divisors (7011725).

21035163 is an equidigital number, since it uses as much as digits as its factorization.

21035163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7011724.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 21035163 is about 4586.4106881089. The cubic root of 21035163 is about 276.0463191533.

Adding to 21035163 its reverse (36153012), we get a palindrome (57188175).

The spelling of 21035163 in words is "twenty-one million, thirty-five thousand, one hundred sixty-three".