21375083 has 8 divisors (see below), whose sum is σ = 21914688. Its totient is φ = 20839104.

The previous prime is 21375061. The next prime is 21375097. The reversal of 21375083 is 38057312.

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

It is a cyclic number.

It is not a de Polignac number, because 21375083 - 2¹⁴ = 21358699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21375023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13985 + ... + 15437.

It is an arithmetic number, because the mean of its divisors is an integer number (2739336).

Almost surely, 2^21375083 is an apocalyptic number.

21375083 is a deficient number, since it is larger than the sum of its proper divisors (539605).

21375083 is a wasteful number, since it uses less digits than its factorization.

21375083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 21375083 is about 4623.3194784700. The cubic root of 21375083 is about 277.5253143587.

The spelling of 21375083 in words is "twenty-one million, three hundred seventy-five thousand, eighty-three".