9920940730 has 16 divisors (see below), whose sum is σ = 17873530920. Its totient is φ = 3964856832.

The previous prime is 9920940703. The next prime is 9920940751. The reversal of 9920940730 is 370490299.

It can be written as a sum of positive squares in 4 ways, for example, as 2297380761 + 7623559969 = 47931^2 + 87313^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428079 + ... + 450658.

Almost surely, 2^9920940730 is an apocalyptic number.

9920940730 is a deficient number, since it is larger than the sum of its proper divisors (7952590190).

9920940730 is a wasteful number, since it uses less digits than its factorization.

9920940730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879873.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 9920940730 is about 99603.9192501982. The cubic root of 9920940730 is about 2148.7420606047.

The spelling of 9920940730 in words is "nine billion, nine hundred twenty million, nine hundred forty thousand, seven hundred thirty".