9920506278 has 16 divisors (see below), whose sum is σ = 19846987776. Its totient is φ = 3305839560.

The previous prime is 9920506273. The next prime is 9920506289. The reversal of 9920506278 is 8726050299.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920506273) 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 7 ways as a sum of consecutive naturals, for example, 227238 + ... + 267353.

It is an arithmetic number, because the mean of its divisors is an integer number (1240436736).

Almost surely, 2^9920506278 is an apocalyptic number.

9920506278 is an abundant number, since it is smaller than the sum of its proper divisors (9926481498).

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

9920506278 is a wasteful number, since it uses less digits than its factorization.

9920506278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497939.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 9920506278 is about 99601.7383282039. The cubic root of 9920506278 is about 2148.7106946641.

The spelling of 9920506278 in words is "nine billion, nine hundred twenty million, five hundred six thousand, two hundred seventy-eight".