21163083 has 4 divisors (see below), whose sum is σ = 28217448. Its totient is φ = 14108720.

The previous prime is 21163061. The next prime is 21163099. The reversal of 21163083 is 38036112.

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 21163083 - 2¹² = 21158987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21163003) 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, 3527178 + ... + 3527183.

It is an arithmetic number, because the mean of its divisors is an integer number (7054362).

Almost surely, 2^21163083 is an apocalyptic number.

21163083 is a deficient number, since it is larger than the sum of its proper divisors (7054365).

21163083 is an equidigital number, since it uses as much as digits as its factorization.

21163083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7054364.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 21163083 is about 4600.3350964903. The cubic root of 21163083 is about 276.6047571997.

Adding to 21163083 its reverse (38036112), we get a palindrome (59199195).

The spelling of 21163083 in words is "twenty-one million, one hundred sixty-three thousand, eighty-three".