18666954560 has 112 divisors (see below), whose sum is σ = 46591825536. Its totient is φ = 7110039552.

The previous prime is 18666954547. The next prime is 18666954571. The reversal of 18666954560 is 6545966681.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18666954496 and 18666954505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1665134 + ... + 1676306.

Almost surely, 2^18666954560 is an apocalyptic number.

18666954560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18666954560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23295912768).

18666954560 is an abundant number, since it is smaller than the sum of its proper divisors (27924870976).

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

18666954560 is a wasteful number, since it uses less digits than its factorization.

18666954560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11440 (or 11430 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 56.

The spelling of 18666954560 in words is "eighteen billion, six hundred sixty-six million, nine hundred fifty-four thousand, five hundred sixty".