9918054720 has 1008 divisors, whose sum is σ = 43635533760. Its totient is φ = 2131992576.

The previous prime is 9918054691. The next prime is 9918054749. The reversal of 9918054720 is 274508199.

9918054720 is a `hidden beast` number, since 9 + 9 + 1 + 80 + 547 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (9918054691) and next prime (9918054749).

It is a tau number, because it is divible by the number of its divisors (1008).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 72394492 + ... + 72394628.

It is an arithmetic number, because the mean of its divisors is an integer number (43289220).

Almost surely, 2^9918054720 is an apocalyptic number.

9918054720 is a gapful number since it is divisible by the number (90) 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 9918054720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21817766880).

9918054720 is an abundant number, since it is smaller than the sum of its proper divisors (33717479040).

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

9918054720 is a wasteful number, since it uses less digits than its factorization.

9918054720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 9918054720 is about 99589.4307645144. The cubic root of 9918054720 is about 2148.5336834404.

The spelling of 9918054720 in words is "nine billion, nine hundred eighteen million, fifty-four thousand, seven hundred twenty".