21103539283 has 4 divisors (see below), whose sum is σ = 21114844600. Its totient is φ = 21092233968.

The previous prime is 21103539253. The next prime is 21103539287. The reversal of 21103539283 is 38293530112.

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 21103539283 - 2¹⁷ = 21103408211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103539287) 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, 5649858 + ... + 5653591.

It is an arithmetic number, because the mean of its divisors is an integer number (5278711150).

Almost surely, 2^21103539283 is an apocalyptic number.

21103539283 is a deficient number, since it is larger than the sum of its proper divisors (11305317).

21103539283 is a wasteful number, since it uses less digits than its factorization.

21103539283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11305316.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 21103539283 in words is "twenty-one billion, one hundred three million, five hundred thirty-nine thousand, two hundred eighty-three".