9947147220 has 48 divisors (see below), whose sum is σ = 30946681920. Its totient is φ = 2652572448.

The previous prime is 9947147213. The next prime is 9947147237. The reversal of 9947147220 is 227417499.

It is a happy number.

9947147220 is a `hidden beast` number, since 9 + 94 + 71 + 472 + 20 = 666.

9947147220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9209782 + ... + 9210861.

It is an arithmetic number, because the mean of its divisors is an integer number (644722540).

Almost surely, 2^9947147220 is an apocalyptic number.

9947147220 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9947147220 is an abundant number, since it is smaller than the sum of its proper divisors (20999534700).

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

9947147220 is a wasteful number, since it uses less digits than its factorization.

9947147220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18420661 (or 18420653 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 9947147220 is about 99735.3859971475. The cubic root of 9947147220 is about 2150.6323879790.

The spelling of 9947147220 in words is "nine billion, nine hundred forty-seven million, one hundred forty-seven thousand, two hundred twenty".