2031891436 has 12 divisors (see below), whose sum is σ = 3581392360. Its totient is φ = 1008636480.

The previous prime is 2031891397. The next prime is 2031891479. The reversal of 2031891436 is 6341981302.

It is a junction number, because it is equal to n+sod(n) for n = 2031891395 and 2031891404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1826685 + ... + 1827796.

Almost surely, 2^2031891436 is an apocalyptic number.

It is an amenable number.

2031891436 is a deficient number, since it is larger than the sum of its proper divisors (1549500924).

2031891436 is a wasteful number, since it uses less digits than its factorization.

2031891436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3654624 (or 3654622 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 2031891436 is about 45076.5064751030. The cubic root of 2031891436 is about 1266.5825488307.

The spelling of 2031891436 in words is "two billion, thirty-one million, eight hundred ninety-one thousand, four hundred thirty-six".