18660363820 has 96 divisors (see below), whose sum is σ = 48949125120. Its totient is φ = 5827230720.

The previous prime is 18660363793. The next prime is 18660363833. The reversal of 18660363820 is 2836306681.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52680 + ... + 200239.

It is an arithmetic number, because the mean of its divisors is an integer number (509886720).

Almost surely, 2^18660363820 is an apocalyptic number.

18660363820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18660363820 is an abundant number, since it is smaller than the sum of its proper divisors (30288761300).

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

18660363820 is a wasteful number, since it uses less digits than its factorization.

18660363820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252983 (or 252981 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 18660363820 in words is "eighteen billion, six hundred sixty million, three hundred sixty-three thousand, eight hundred twenty".