18140797680 has 160 divisors (see below), whose sum is σ = 57999412800. Its totient is φ = 4687503360.

The previous prime is 18140797679. The next prime is 18140797709. The reversal of 18140797680 is 8679704181.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 1459974 + ... + 1472346.

It is an arithmetic number, because the mean of its divisors is an integer number (362496330).

Almost surely, 2^18140797680 is an apocalyptic number.

18140797680 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 18140797680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28999706400).

18140797680 is an abundant number, since it is smaller than the sum of its proper divisors (39858615120).

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

18140797680 is a wasteful number, since it uses less digits than its factorization.

18140797680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12579 (or 12573 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 51.

The spelling of 18140797680 in words is "eighteen billion, one hundred forty million, seven hundred ninety-seven thousand, six hundred eighty".