18426850069 has 4 divisors (see below), whose sum is σ = 19510782444. Its totient is φ = 17342917696.

The previous prime is 18426850037. The next prime is 18426850081. The reversal of 18426850069 is 96005862481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96005862481 = 1697 ⋅56573873.

It can be written as a sum of positive squares in 2 ways, for example, as 11693827044 + 6733023025 = 108138^2 + 82055^2 .

It is a cyclic number.

It is not a de Polignac number, because 18426850069 - 2⁵ = 18426850037 is a prime.

It is a super-2 number, since 2×18426850069² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18426850469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541966162 + ... + 541966195.

It is an arithmetic number, because the mean of its divisors is an integer number (4877695611).

Almost surely, 2^18426850069 is an apocalyptic number.

It is an amenable number.

18426850069 is a deficient number, since it is larger than the sum of its proper divisors (1083932375).

18426850069 is a wasteful number, since it uses less digits than its factorization.

18426850069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083932374.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 18426850069 in words is "eighteen billion, four hundred twenty-six million, eight hundred fifty thousand, sixty-nine".