18270891793 has 16 divisors (see below), whose sum is σ = 22833699840. Its totient is φ = 14203054800.

The previous prime is 18270891767. The next prime is 18270891803. The reversal of 18270891793 is 39719807281.

It is not a de Polignac number, because 18270891793 - 2⁵ = 18270891761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18270891293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250893 + ... + 315418.

It is an arithmetic number, because the mean of its divisors is an integer number (1427106240).

Almost surely, 2^18270891793 is an apocalyptic number.

It is an amenable number.

18270891793 is a deficient number, since it is larger than the sum of its proper divisors (4562808047).

18270891793 is a wasteful number, since it uses less digits than its factorization.

18270891793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566748.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 18270891793 in words is "eighteen billion, two hundred seventy million, eight hundred ninety-one thousand, seven hundred ninety-three".