18389204560 has 40 divisors (see below), whose sum is σ = 43749208800. Its totient is φ = 7184618112.

The previous prime is 18389204543. The next prime is 18389204567. The reversal of 18389204560 is 6540298381.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 18389204560.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18389204567) 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, 2669410 + ... + 2676289.

It is an arithmetic number, because the mean of its divisors is an integer number (1093730220).

Almost surely, 2^18389204560 is an apocalyptic number.

18389204560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18389204560 is an abundant number, since it is smaller than the sum of its proper divisors (25360004240).

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

18389204560 is a wasteful number, since it uses less digits than its factorization.

18389204560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5345755 (or 5345749 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 18389204560 in words is "eighteen billion, three hundred eighty-nine million, two hundred four thousand, five hundred sixty".