9636590021 has 8 divisors (see below), whose sum is σ = 9875076288. Its totient is φ = 9398268000.

The previous prime is 9636590017. The next prime is 9636590099. The reversal of 9636590021 is 1200956369.

9636590021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9636590021 - 2² = 9636590017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9636590921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82256 + ... + 161366.

It is an arithmetic number, because the mean of its divisors is an integer number (1234384536).

Almost surely, 2^9636590021 is an apocalyptic number.

It is an amenable number.

9636590021 is a deficient number, since it is larger than the sum of its proper divisors (238486267).

9636590021 is a wasteful number, since it uses less digits than its factorization.

9636590021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82123.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 9636590021 is about 98166.1347970877. The cubic root of 9636590021 is about 2128.0139025140.

The spelling of 9636590021 in words is "nine billion, six hundred thirty-six million, five hundred ninety thousand, twenty-one".