18805254533420 has 12 divisors (see below), whose sum is σ = 39491034520224. Its totient is φ = 7522101813360.

The previous prime is 18805254533413. The next prime is 18805254533423. The reversal of 18805254533420 is 2433545250881.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18805254533423) 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, 470131363316 + ... + 470131363355.

It is an arithmetic number, because the mean of its divisors is an integer number (3290919543352).

Almost surely, 2^{18805254533420} is an apocalyptic number.

18805254533420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18805254533420 is an abundant number, since it is smaller than the sum of its proper divisors (20685779986804).

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

18805254533420 is a wasteful number, since it uses less digits than its factorization.

18805254533420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940262726680 (or 940262726678 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 50.

The spelling of 18805254533420 in words is "eighteen trillion, eight hundred five billion, two hundred fifty-four million, five hundred thirty-three thousand, four hundred twenty".