2091186381 has 8 divisors (see below), whose sum is σ = 2909476800. Its totient is φ = 1333510112.

The previous prime is 2091186343. The next prime is 2091186401. The reversal of 2091186381 is 1836811902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2091186381 - 2²⁷ = 1956968653 is a prime.

It is a super-2 number, since 2×2091186381² = 8746120960159754322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091185381) 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, 15153456 + ... + 15153593.

It is an arithmetic number, because the mean of its divisors is an integer number (363684600).

Almost surely, 2^2091186381 is an apocalyptic number.

It is an amenable number.

2091186381 is a deficient number, since it is larger than the sum of its proper divisors (818290419).

2091186381 is a wasteful number, since it uses less digits than its factorization.

2091186381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30307075.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 2091186381 is about 45729.4913704493. The cubic root of 2091186381 is about 1278.7851390353.

The spelling of 2091186381 in words is "two billion, ninety-one million, one hundred eighty-six thousand, three hundred eighty-one".