2081993518 has 24 divisors (see below), whose sum is σ = 3435390000. Its totient is φ = 945621600.

The previous prime is 2081993513. The next prime is 2081993527. The reversal of 2081993518 is 8153991802.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081993513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 413983 + ... + 418981.

It is an arithmetic number, because the mean of its divisors is an integer number (143141250).

Almost surely, 2^2081993518 is an apocalyptic number.

2081993518 is a deficient number, since it is larger than the sum of its proper divisors (1353396482).

2081993518 is a wasteful number, since it uses less digits than its factorization.

2081993518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6744 (or 6733 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 2081993518 is about 45628.8671566586. The cubic root of 2081993518 is about 1276.9085384417.

It can be divided in two parts, 2081 and 993518, that added together give a palindrome (995599).

The spelling of 2081993518 in words is "two billion, eighty-one million, nine hundred ninety-three thousand, five hundred eighteen".