9491048021 has 32 divisors (see below), whose sum is σ = 12087694080. Its totient is φ = 7252084224.

The previous prime is 9491047999. The next prime is 9491048033. The reversal of 9491048021 is 1208401949.

It is not a de Polignac number, because 9491048021 - 2¹⁰ = 9491046997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9491048521) 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 31 ways as a sum of consecutive naturals, for example, 334631 + ... + 361883.

It is an arithmetic number, because the mean of its divisors is an integer number (377740440).

Almost surely, 2^9491048021 is an apocalyptic number.

9491048021 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9491048021 is a deficient number, since it is larger than the sum of its proper divisors (2596646059).

9491048021 is a wasteful number, since it uses less digits than its factorization.

9491048021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27405.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 9491048021 is about 97422.0099412859. The cubic root of 9491048021 is about 2117.2463373811.

The spelling of 9491048021 in words is "nine billion, four hundred ninety-one million, forty-eight thousand, twenty-one".