18381910019291 has 24 divisors (see below), whose sum is σ = 22982713969824. Its totient is φ = 14393991306240.

The previous prime is 18381910019227. The next prime is 18381910019309. The reversal of 18381910019291 is 19291001918381.

It is not a de Polignac number, because 18381910019291 - 2⁶ = 18381910019227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18381910019491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79980020 + ... + 80209521.

It is an arithmetic number, because the mean of its divisors is an integer number (957613082076).

Almost surely, 2^{18381910019291} is an apocalyptic number.

18381910019291 is a deficient number, since it is larger than the sum of its proper divisors (4600803950533).

18381910019291 is a wasteful number, since it uses less digits than its factorization.

18381910019291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160189671 (or 160189658 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 53.

The spelling of 18381910019291 in words is "eighteen trillion, three hundred eighty-one billion, nine hundred ten million, nineteen thousand, two hundred ninety-one".