2081239544 has 16 divisors (see below), whose sum is σ = 3905080200. Its totient is φ = 1039884832.

The previous prime is 2081239519. The next prime is 2081239547. The reversal of 2081239544 is 4459321802.

It is a junction number, because it is equal to n+sod(n) for n = 2081239498 and 2081239507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081239547) 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, 79739 + ... + 102570.

Almost surely, 2^2081239544 is an apocalyptic number.

It is an amenable number.

2081239544 is a deficient number, since it is larger than the sum of its proper divisors (1823840656).

2081239544 is a wasteful number, since it uses less digits than its factorization.

2081239544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183742 (or 183738 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 2081239544 is about 45620.6043800386. The cubic root of 2081239544 is about 1276.7543797678.

The spelling of 2081239544 in words is "two billion, eighty-one million, two hundred thirty-nine thousand, five hundred forty-four".