21448083 has 4 divisors (see below), whose sum is σ = 28597448. Its totient is φ = 14298720.

The previous prime is 21448079. The next prime is 21448127. The reversal of 21448083 is 38084412.

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

It is not a de Polignac number, because 21448083 - 2² = 21448079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21448083.

It is not an unprimeable number, because it can be changed into a prime (21448003) 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, 3574678 + ... + 3574683.

It is an arithmetic number, because the mean of its divisors is an integer number (7149362).

Almost surely, 2^21448083 is an apocalyptic number.

21448083 is a deficient number, since it is larger than the sum of its proper divisors (7149365).

21448083 is an equidigital number, since it uses as much as digits as its factorization.

21448083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7149364.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 21448083 is about 4631.2075099265. The cubic root of 21448083 is about 277.8408894050.

The spelling of 21448083 in words is "twenty-one million, four hundred forty-eight thousand, eighty-three".