18734550912 has 640 divisors, whose sum is σ = 71848212480. Its totient is φ = 4702924800.

The previous prime is 18734550911. The next prime is 18734550931. The reversal of 18734550912 is 21905543781.

18734550912 is a `hidden beast` number, since 1 + 8 + 7 + 3 + 4 + 550 + 91 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18734550911) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 24748038 + ... + 24748794.

It is an arithmetic number, because the mean of its divisors is an integer number (112262832).

Almost surely, 2^18734550912 is an apocalyptic number.

18734550912 is a gapful number since it is divisible by the number (12) 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 18734550912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35924106240).

18734550912 is an abundant number, since it is smaller than the sum of its proper divisors (53113661568).

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

18734550912 is a wasteful number, since it uses less digits than its factorization.

18734550912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 18734550912 in words is "eighteen billion, seven hundred thirty-four million, five hundred fifty thousand, nine hundred twelve".