9920648951 has 4 divisors (see below), whose sum is σ = 9981511992. Its totient is φ = 9859785912.

The previous prime is 9920648921. The next prime is 9920648971. The reversal of 9920648951 is 1598460299.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9920648951 - 2⁶ = 9920648887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9920648893 and 9920648902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920648921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30431276 + ... + 30431601.

It is an arithmetic number, because the mean of its divisors is an integer number (2495377998).

Almost surely, 2^9920648951 is an apocalyptic number.

9920648951 is a deficient number, since it is larger than the sum of its proper divisors (60863041).

9920648951 is a wasteful number, since it uses less digits than its factorization.

9920648951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60863040.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The square root of 9920648951 is about 99602.4545430483. The cubic root of 9920648951 is about 2148.7209952652.

The spelling of 9920648951 in words is "nine billion, nine hundred twenty million, six hundred forty-eight thousand, nine hundred fifty-one".