2081837199906 has 40 divisors (see below), whose sum is σ = 4666741597980. Its totient is φ = 693665443872.

The previous prime is 2081837199833. The next prime is 2081837199931. The reversal of 2081837199906 is 6099917381802.

It can be written as a sum of positive squares in 2 ways, for example, as 2064512059281 + 17325140625 = 1436841^2 + 131625^2 .

It is a super-2 number, since 2×2081837199906² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2192761 + ... + 2995308.

Almost surely, 2^{2081837199906} is an apocalyptic number.

2081837199906 is an abundant number, since it is smaller than the sum of its proper divisors (2584904398074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2081837199906 is a wasteful number, since it uses less digits than its factorization.

2081837199906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5190560 (or 5190551 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 63.

The spelling of 2081837199906 in words is "two trillion, eighty-one billion, eight hundred thirty-seven million, one hundred ninety-nine thousand, nine hundred six".