9813918970 has 8 divisors (see below), whose sum is σ = 17665054164. Its totient is φ = 3925567584.

The previous prime is 9813918943. The next prime is 9813918973. The reversal of 9813918970 is 798193189.

It can be written as a sum of positive squares in 2 ways, for example, as 9771915609 + 42003361 = 98853^2 + 6481^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (9813918973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490695939 + ... + 490695958.

Almost surely, 2^9813918970 is an apocalyptic number.

9813918970 is a deficient number, since it is larger than the sum of its proper divisors (7851135194).

9813918970 is a wasteful number, since it uses less digits than its factorization.

9813918970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981391904.

The product of its (nonzero) digits is 979776, while the sum is 55.

The square root of 9813918970 is about 99065.2258363145. The cubic root of 9813918970 is about 2140.9876195168.

The spelling of 9813918970 in words is "nine billion, eight hundred thirteen million, nine hundred eighteen thousand, nine hundred seventy".