9920355585 has 32 divisors (see below), whose sum is σ = 18162278400. Its totient is φ = 4529469888.

The previous prime is 9920355581. The next prime is 9920355629. The reversal of 9920355585 is 5855530299.

It is not a de Polignac number, because 9920355585 - 2² = 9920355581 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9920355581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29016 + ... + 143814.

It is an arithmetic number, because the mean of its divisors is an integer number (567571200).

Almost surely, 2^9920355585 is an apocalyptic number.

It is an amenable number.

9920355585 is a deficient number, since it is larger than the sum of its proper divisors (8241922815).

9920355585 is a wasteful number, since it uses less digits than its factorization.

9920355585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115637.

The product of its (nonzero) digits is 2430000, while the sum is 51.

The square root of 9920355585 is about 99600.9818475702. The cubic root of 9920355585 is about 2148.6998149338.

The spelling of 9920355585 in words is "nine billion, nine hundred twenty million, three hundred fifty-five thousand, five hundred eighty-five".