18743916780 has 336 divisors, whose sum is σ = 63857082240. Its totient is φ = 4601401344.

The previous prime is 18743916761. The next prime is 18743916781. The reversal of 18743916780 is 8761934781.

18743916780 is a `hidden beast` number, since 187 + 4 + 391 + 6 + 78 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18743916781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 11648616 + ... + 11650224.

It is an arithmetic number, because the mean of its divisors is an integer number (190050840).

Almost surely, 2^18743916780 is an apocalyptic number.

18743916780 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 18743916780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31928541120).

18743916780 is an abundant number, since it is smaller than the sum of its proper divisors (45113165460).

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

18743916780 is a wasteful number, since it uses less digits than its factorization.

18743916780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700 (or 1683 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 18743916780 in words is "eighteen billion, seven hundred forty-three million, nine hundred sixteen thousand, seven hundred eighty".