21839110273 has 4 divisors (see below), whose sum is σ = 21844703920. Its totient is φ = 21833516628.

The previous prime is 21839110253. The next prime is 21839110277. The reversal of 21839110273 is 37201193812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21839110273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21839110277) 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, 2790963 + ... + 2798776.

It is an arithmetic number, because the mean of its divisors is an integer number (5461175980).

Almost surely, 2^21839110273 is an apocalyptic number.

It is an amenable number.

21839110273 is a deficient number, since it is larger than the sum of its proper divisors (5593647).

21839110273 is an equidigital number, since it uses as much as digits as its factorization.

21839110273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5593646.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 21839110273 in words is "twenty-one billion, eight hundred thirty-nine million, one hundred ten thousand, two hundred seventy-three".