18461662320 has 160 divisors (see below), whose sum is σ = 58238129664. Its totient is φ = 4837248000.

The previous prime is 18461662309. The next prime is 18461662321. The reversal of 18461662320 is 2326616481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18461662321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3235470 + ... + 3241170.

Almost surely, 2^18461662320 is an apocalyptic number.

18461662320 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 18461662320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29119064832).

18461662320 is an abundant number, since it is smaller than the sum of its proper divisors (39776467344).

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

18461662320 is a wasteful number, since it uses less digits than its factorization.

18461662320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5951 (or 5945 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 18461662320 in words is "eighteen billion, four hundred sixty-one million, six hundred sixty-two thousand, three hundred twenty".