9918789514 has 32 divisors (see below), whose sum is σ = 15712695936. Its totient is φ = 4686612480.

The previous prime is 9918789511. The next prime is 9918789539. The reversal of 9918789514 is 4159878199.

It is not an unprimeable number, because it can be changed into a prime (9918789511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3081634 + ... + 3084850.

It is an arithmetic number, because the mean of its divisors is an integer number (491021748).

Almost surely, 2^9918789514 is an apocalyptic number.

9918789514 is a deficient number, since it is larger than the sum of its proper divisors (5793906422).

9918789514 is a wasteful number, since it uses less digits than its factorization.

9918789514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030.

The product of its digits is 6531840, while the sum is 61.

The square root of 9918789514 is about 99593.1198125654. The cubic root of 9918789514 is about 2148.5867412465.

The spelling of 9918789514 in words is "nine billion, nine hundred eighteen million, seven hundred eighty-nine thousand, five hundred fourteen".