18200090091 has 8 divisors (see below), whose sum is σ = 24267409984. Its totient is φ = 12133081800.

The previous prime is 18200090089. The next prime is 18200090093. The reversal of 18200090091 is 19009000281.

It is an interprime number because it is at equal distance from previous prime (18200090089) and next prime (18200090093).

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

It is not a de Polignac number, because 18200090091 - 2¹ = 18200090089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18200090093) 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, 190380 + ... + 269526.

It is an arithmetic number, because the mean of its divisors is an integer number (3033426248).

Almost surely, 2^18200090091 is an apocalyptic number.

18200090091 is a deficient number, since it is larger than the sum of its proper divisors (6067319893).

18200090091 is an equidigital number, since it uses as much as digits as its factorization.

18200090091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155801.

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 18200090091 in words is "eighteen billion, two hundred million, ninety thousand, ninety-one".