18660471288432 has 20 divisors (see below), whose sum is σ = 48206217495240. Its totient is φ = 6220157096128.

The previous prime is 18660471288427. The next prime is 18660471288491. The reversal of 18660471288432 is 23488217406681.

It is a super-2 number, since 2×18660471288432² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194379909207 + ... + 194379909302.

It is an arithmetic number, because the mean of its divisors is an integer number (2410310874762).

Almost surely, 2^{18660471288432} is an apocalyptic number.

18660471288432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18660471288432 is an abundant number, since it is smaller than the sum of its proper divisors (29545746206808).

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

18660471288432 is a wasteful number, since it uses less digits than its factorization.

18660471288432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388759818520 (or 388759818514 counting only the distinct ones).

The product of its (nonzero) digits is 24772608, while the sum is 60.

The spelling of 18660471288432 in words is "eighteen trillion, six hundred sixty billion, four hundred seventy-one million, two hundred eighty-eight thousand, four hundred thirty-two".