18495317951 has 8 divisors (see below), whose sum is σ = 20263308624. Its totient is φ = 16741760320.

The previous prime is 18495317947. The next prime is 18495318013. The reversal of 18495317951 is 15971359481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18495317951 - 2² = 18495317947 is a prime.

It is a super-2 number, since 2×18495317951² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18495317893 and 18495317902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18495317651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3605576 + ... + 3610701.

It is an arithmetic number, because the mean of its divisors is an integer number (2532913578).

Almost surely, 2^18495317951 is an apocalyptic number.

18495317951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18495317951 is a deficient number, since it is larger than the sum of its proper divisors (1767990673).

18495317951 is a wasteful number, since it uses less digits than its factorization.

18495317951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7216521.

The product of its digits is 1360800, while the sum is 53.

The spelling of 18495317951 in words is "eighteen billion, four hundred ninety-five million, three hundred seventeen thousand, nine hundred fifty-one".