21168083 has 4 divisors (see below), whose sum is σ = 21660408. Its totient is φ = 20675760.

The previous prime is 21168053. The next prime is 21168101. The reversal of 21168083 is 38086112.

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 21168083 - 2¹⁶ = 21102547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21168023) 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, 246098 + ... + 246183.

It is an arithmetic number, because the mean of its divisors is an integer number (5415102).

Almost surely, 2^21168083 is an apocalyptic number.

21168083 is a deficient number, since it is larger than the sum of its proper divisors (492325).

21168083 is an equidigital number, since it uses as much as digits as its factorization.

21168083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492324.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 21168083 is about 4600.8785030687. The cubic root of 21168083 is about 276.6265390746.

The spelling of 21168083 in words is "twenty-one million, one hundred sixty-eight thousand, eighty-three".