9820040521 has 8 divisors (see below), whose sum is σ = 9839309760. Its totient is φ = 9800791152.

The previous prime is 9820040513. The next prime is 9820040533. The reversal of 9820040521 is 1250400289.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9820040521 - 2³ = 9820040513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9820040501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1295340 + ... + 1302898.

It is an arithmetic number, because the mean of its divisors is an integer number (1229913720).

Almost surely, 2^9820040521 is an apocalyptic number.

It is an amenable number.

9820040521 is a deficient number, since it is larger than the sum of its proper divisors (19269239).

9820040521 is a wasteful number, since it uses less digits than its factorization.

9820040521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9935.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 9820040521 is about 99096.1175879257. The cubic root of 9820040521 is about 2141.4326826577.

The spelling of 9820040521 in words is "nine billion, eight hundred twenty million, forty thousand, five hundred twenty-one".