18719131095 has 96 divisors (see below), whose sum is σ = 39517949952. Its totient is φ = 8010959616.

The previous prime is 18719131087. The next prime is 18719131099. The reversal of 18719131095 is 59013191781.

It is a happy number.

It is not a de Polignac number, because 18719131095 - 2³ = 18719131087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18719131095.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18719131099) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 313029 + ... + 368001.

It is an arithmetic number, because the mean of its divisors is an integer number (411645312).

Almost surely, 2^18719131095 is an apocalyptic number.

18719131095 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18719131095 is an abundant number, since it is smaller than the sum of its proper divisors (20798818857).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18719131095 is a wasteful number, since it uses less digits than its factorization.

18719131095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55061 (or 55058 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 45.

The spelling of 18719131095 in words is "eighteen billion, seven hundred nineteen million, one hundred thirty-one thousand, ninety-five".