18191091022 has 16 divisors (see below), whose sum is σ = 29401146432. Its totient is φ = 8391448800.

The previous prime is 18191091019. The next prime is 18191091031. The reversal of 18191091022 is 22019019181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134598 + ... + 233449.

It is an arithmetic number, because the mean of its divisors is an integer number (1837571652).

Almost surely, 2^18191091022 is an apocalyptic number.

18191091022 is a deficient number, since it is larger than the sum of its proper divisors (11210055410).

18191091022 is a wasteful number, since it uses less digits than its factorization.

18191091022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369963.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 18191091022 in words is "eighteen billion, one hundred ninety-one million, ninety-one thousand, twenty-two".