18087951093 has 4 divisors (see below), whose sum is σ = 24117268128. Its totient is φ = 12058634060.

The previous prime is 18087951067. The next prime is 18087951107. The reversal of 18087951093 is 39015978081.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39015978081 = 3 ⋅13005326027.

It is a cyclic number.

It is not a de Polignac number, because 18087951093 - 2⁶ = 18087951029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18087951593) 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, 3014658513 + ... + 3014658518.

It is an arithmetic number, because the mean of its divisors is an integer number (6029317032).

Almost surely, 2^18087951093 is an apocalyptic number.

It is an amenable number.

18087951093 is a deficient number, since it is larger than the sum of its proper divisors (6029317035).

18087951093 is an equidigital number, since it uses as much as digits as its factorization.

18087951093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6029317034.

The product of its (nonzero) digits is 544320, while the sum is 51.

The spelling of 18087951093 in words is "eighteen billion, eighty-seven million, nine hundred fifty-one thousand, ninety-three".