18419684845 has 8 divisors (see below), whose sum is σ = 22200145560. Its totient is φ = 14671398720.

The previous prime is 18419684831. The next prime is 18419684869. The reversal of 18419684845 is 54848691481.

It can be written as a sum of positive squares in 4 ways, for example, as 6328043401 + 12091641444 = 79549^2 + 109962^2 .

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

It is not a de Polignac number, because 18419684845 - 2⁵ = 18419684813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18419684845.

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, 8042386 + ... + 8044675.

It is an arithmetic number, because the mean of its divisors is an integer number (2775018195).

Almost surely, 2^18419684845 is an apocalyptic number.

It is an amenable number.

18419684845 is a deficient number, since it is larger than the sum of its proper divisors (3780460715).

18419684845 is a wasteful number, since it uses less digits than its factorization.

18419684845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16087295.

The product of its digits is 8847360, while the sum is 58.

The spelling of 18419684845 in words is "eighteen billion, four hundred nineteen million, six hundred eighty-four thousand, eight hundred forty-five".