18342508509351 has 32 divisors (see below), whose sum is σ = 29265502129920. Its totient is φ = 11287272838752.

The previous prime is 18342508509331. The next prime is 18342508509371. The reversal of 18342508509351 is 15390580524381.

18342508509351 is a `hidden beast` number, since 1 + 8 + 3 + 42 + 508 + 5 + 0 + 93 + 5 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (18342508509331) and next prime (18342508509371).

It is not a de Polignac number, because 18342508509351 - 2¹¹ = 18342508507303 is a prime.

It is a super-2 number, since 2×18342508509351² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18342508509331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8488756 + ... + 10428038.

It is an arithmetic number, because the mean of its divisors is an integer number (914546941560).

Almost surely, 2^{18342508509351} is an apocalyptic number.

18342508509351 is a deficient number, since it is larger than the sum of its proper divisors (10922993620569).

18342508509351 is a wasteful number, since it uses less digits than its factorization.

18342508509351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966252 (or 1966246 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 54.

The spelling of 18342508509351 in words is "eighteen trillion, three hundred forty-two billion, five hundred eight million, five hundred nine thousand, three hundred fifty-one".