18666703352 has 64 divisors (see below), whose sum is σ = 39474570240. Its totient is φ = 8200656000.

The previous prime is 18666703339. The next prime is 18666703357. The reversal of 18666703352 is 25330766681.

It is a junction number, because it is equal to n+sod(n) for n = 18666703297 and 18666703306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18666703357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472673 + ... + 510639.

It is an arithmetic number, because the mean of its divisors is an integer number (616790160).

Almost surely, 2^18666703352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18666703352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19737285120).

18666703352 is an abundant number, since it is smaller than the sum of its proper divisors (20807866888).

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

18666703352 is a wasteful number, since it uses less digits than its factorization.

18666703352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38172 (or 38168 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 18666703352 in words is "eighteen billion, six hundred sixty-six million, seven hundred three thousand, three hundred fifty-two".