1894831132091 has 4 divisors (see below), whose sum is σ = 1923112193832. Its totient is φ = 1866550070352.

The previous prime is 1894831132087. The next prime is 1894831132109. The reversal of 1894831132091 is 1902311384981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1894831132091 - 2² = 1894831132087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1894831132021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14140530770 + ... + 14140530903.

It is an arithmetic number, because the mean of its divisors is an integer number (480778048458).

Almost surely, 2^{1894831132091} is an apocalyptic number.

1894831132091 is a deficient number, since it is larger than the sum of its proper divisors (28281061741).

1894831132091 is an equidigital number, since it uses as much as digits as its factorization.

1894831132091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28281061740.

The product of its (nonzero) digits is 373248, while the sum is 50.

The spelling of 1894831132091 in words is "one trillion, eight hundred ninety-four billion, eight hundred thirty-one million, one hundred thirty-two thousand, ninety-one".