18645286562320 has 160 divisors (see below), whose sum is σ = 47576070472320. Its totient is φ = 6739299409920.

The previous prime is 18645286562303. The next prime is 18645286562363. The reversal of 18645286562320 is 2326568254681.

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, 380701354 + ... + 380750326.

It is an arithmetic number, because the mean of its divisors is an integer number (297350440452).

Almost surely, 2^{18645286562320} is an apocalyptic number.

18645286562320 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 18645286562320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23788035236160).

18645286562320 is an abundant number, since it is smaller than the sum of its proper divisors (28930783910000).

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

18645286562320 is a wasteful number, since it uses less digits than its factorization.

18645286562320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51593 (or 51587 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 58.

The spelling of 18645286562320 in words is "eighteen trillion, six hundred forty-five billion, two hundred eighty-six million, five hundred sixty-two thousand, three hundred twenty".