18540034071859 has 8 divisors (see below), whose sum is σ = 18648012994992. Its totient is φ = 18432353022720.

The previous prime is 18540034071733. The next prime is 18540034071887. The reversal of 18540034071859 is 95817043004581.

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 18540034071859 - 2²¹ = 18540031974707 is a prime.

It is a super-2 number, since 2×18540034071859² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18540034071659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74343654 + ... + 74592619.

It is an arithmetic number, because the mean of its divisors is an integer number (2331001624374).

Almost surely, 2^{18540034071859} is an apocalyptic number.

18540034071859 is a deficient number, since it is larger than the sum of its proper divisors (107978923133).

18540034071859 is a wasteful number, since it uses less digits than its factorization.

18540034071859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148936997.

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 18540034071859 in words is "eighteen trillion, five hundred forty billion, thirty-four million, seventy-one thousand, eight hundred fifty-nine".