2104448781 has 4 divisors (see below), whose sum is σ = 2805931712. Its totient is φ = 1402965852.

The previous prime is 2104448693. The next prime is 2104448783. The reversal of 2104448781 is 1878444012.

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 not a de Polignac number, because 2104448781 - 2⁷ = 2104448653 is a prime.

It is a super-2 number, since 2×2104448781² = 8857409343704771922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104448783) 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, 350741461 + ... + 350741466.

It is an arithmetic number, because the mean of its divisors is an integer number (701482928).

Almost surely, 2^2104448781 is an apocalyptic number.

It is an amenable number.

2104448781 is a deficient number, since it is larger than the sum of its proper divisors (701482931).

2104448781 is an equidigital number, since it uses as much as digits as its factorization.

2104448781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701482930.

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 2104448781 is about 45874.2714492557. The cubic root of 2104448781 is about 1281.4828154646.

The spelling of 2104448781 in words is "two billion, one hundred four million, four hundred forty-eight thousand, seven hundred eighty-one".