2081131636 has 24 divisors (see below), whose sum is σ = 4059175680. Its totient is φ = 927810432.

The previous prime is 2081131573. The next prime is 2081131639. The reversal of 2081131636 is 6361311802.

It is a super-2 number, since 2×2081131636² = 8662217772720072992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2081131598 and 2081131607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081131639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804100 + ... + 806683.

It is an arithmetic number, because the mean of its divisors is an integer number (169132320).

Almost surely, 2^2081131636 is an apocalyptic number.

It is an amenable number.

2081131636 is a deficient number, since it is larger than the sum of its proper divisors (1978044044).

2081131636 is a wasteful number, since it uses less digits than its factorization.

2081131636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610823 (or 1610821 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 2081131636 is about 45619.4216973429. The cubic root of 2081131636 is about 1276.7323136882.

The spelling of 2081131636 in words is "two billion, eighty-one million, one hundred thirty-one thousand, six hundred thirty-six".