21216166300453 has 8 divisors (see below), whose sum is σ = 21239720062400. Its totient is φ = 21192614483040.

The previous prime is 21216166300411. The next prime is 21216166300519. The reversal of 21216166300453 is 35400366161212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21216166300453 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 (21216166300753) 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, 21919648 + ... + 22867078.

It is an arithmetic number, because the mean of its divisors is an integer number (2654965007800).

Almost surely, 2^{21216166300453} is an apocalyptic number.

It is an amenable number.

21216166300453 is a deficient number, since it is larger than the sum of its proper divisors (23553761947).

21216166300453 is an equidigital number, since it uses as much as digits as its factorization.

21216166300453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972267.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 21216166300453 in words is "twenty-one trillion, two hundred sixteen billion, one hundred sixty-six million, three hundred thousand, four hundred fifty-three".