18509341683516 has 24 divisors (see below), whose sum is σ = 43188562317264. Its totient is φ = 6169766505600.

The previous prime is 18509341683493. The next prime is 18509341683533. The reversal of 18509341683516 is 61538614390581.

It is a happy number.

It is a super-2 number, since 2×18509341683516² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18509341683516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4670566 + ... + 7670258.

It is an arithmetic number, because the mean of its divisors is an integer number (1799523429886).

Almost surely, 2^{18509341683516} is an apocalyptic number.

It is an amenable number.

18509341683516 is an abundant number, since it is smaller than the sum of its proper divisors (24679220633748).

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

18509341683516 is a wasteful number, since it uses less digits than its factorization.

18509341683516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513901 (or 3513899 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 60.

The spelling of 18509341683516 in words is "eighteen trillion, five hundred nine billion, three hundred forty-one million, six hundred eighty-three thousand, five hundred sixteen".