18202191393 has 4 divisors (see below), whose sum is σ = 24269588528. Its totient is φ = 12134794260.

The previous prime is 18202191383. The next prime is 18202191409. The reversal of 18202191393 is 39319120281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18202191393 - 2⁵ = 18202191361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18202191313) 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, 3033698563 + ... + 3033698568.

It is an arithmetic number, because the mean of its divisors is an integer number (6067397132).

Almost surely, 2^18202191393 is an apocalyptic number.

It is an amenable number.

18202191393 is a deficient number, since it is larger than the sum of its proper divisors (6067397135).

18202191393 is an equidigital number, since it uses as much as digits as its factorization.

18202191393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6067397134.

The product of its (nonzero) digits is 23328, while the sum is 39.

The spelling of 18202191393 in words is "eighteen billion, two hundred two million, one hundred ninety-one thousand, three hundred ninety-three".