18818745546 has 16 divisors (see below), whose sum is σ = 37644501600. Its totient is φ = 6271746768.

The previous prime is 18818745541. The next prime is 18818745553. The reversal of 18818745546 is 64554781881.

It is not an unprimeable number, because it can be changed into a prime (18818745541) 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, 256881 + ... + 321908.

It is an arithmetic number, because the mean of its divisors is an integer number (2352781350).

Almost surely, 2^18818745546 is an apocalyptic number.

18818745546 is an abundant number, since it is smaller than the sum of its proper divisors (18825756054).

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

18818745546 is a wasteful number, since it uses less digits than its factorization.

18818745546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584213.

The product of its digits is 8601600, while the sum is 57.

The spelling of 18818745546 in words is "eighteen billion, eight hundred eighteen million, seven hundred forty-five thousand, five hundred forty-six".