18450634705781 has 8 divisors (see below), whose sum is σ = 19255587967104. Its totient is φ = 17645910757200.

The previous prime is 18450634705751. The next prime is 18450634705799. The reversal of 18450634705781 is 18750743605481.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18450634705781 is a prime.

It is a super-2 number, since 2×18450634705781² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18450634705781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18450634705751) 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, 57163745 + ... + 57485606.

It is an arithmetic number, because the mean of its divisors is an integer number (2406948495888).

Almost surely, 2^{18450634705781} is an apocalyptic number.

It is an amenable number.

18450634705781 is a deficient number, since it is larger than the sum of its proper divisors (804953261323).

18450634705781 is a wasteful number, since it uses less digits than its factorization.

18450634705781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114656371.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 18450634705781 in words is "eighteen trillion, four hundred fifty billion, six hundred thirty-four million, seven hundred five thousand, seven hundred eighty-one".