21446730983 has 4 divisors (see below), whose sum is σ = 21448896600. Its totient is φ = 21444565368.

The previous prime is 21446730931. The next prime is 21446731001. The reversal of 21446730983 is 38903764412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21446730983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21446730913) 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, 1067885 + ... + 1087782.

It is an arithmetic number, because the mean of its divisors is an integer number (5362224150).

Almost surely, 2^21446730983 is an apocalyptic number.

21446730983 is a deficient number, since it is larger than the sum of its proper divisors (2165617).

21446730983 is an equidigital number, since it uses as much as digits as its factorization.

21446730983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165616.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 21446730983 in words is "twenty-one billion, four hundred forty-six million, seven hundred thirty thousand, nine hundred eighty-three".