21207183206453 has 16 divisors (see below), whose sum is σ = 21421104168960. Its totient is φ = 20994005214000.

The previous prime is 21207183206431. The next prime is 21207183206459. The reversal of 21207183206453 is 35460238170212.

It is a cyclic number.

It is not a de Polignac number, because 21207183206453 - 2³⁶ = 21138463729717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21207183206459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1000753088 + ... + 1000774278.

It is an arithmetic number, because the mean of its divisors is an integer number (1338819010560).

Almost surely, 2^{21207183206453} is an apocalyptic number.

It is an amenable number.

21207183206453 is a deficient number, since it is larger than the sum of its proper divisors (213920962507).

21207183206453 is a wasteful number, since it uses less digits than its factorization.

21207183206453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38248.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 21207183206453 in words is "twenty-one trillion, two hundred seven billion, one hundred eighty-three million, two hundred six thousand, four hundred fifty-three".