21213610645433 has 8 divisors (see below), whose sum is σ = 21304038432768. Its totient is φ = 21123365357664.

The previous prime is 21213610645397. The next prime is 21213610645489. The reversal of 21213610645433 is 33454601631212.

It is a happy number.

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 21213610645433 - 2¹⁴ = 21213610629049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213610645033) 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, 45391916 + ... + 45856877.

It is an arithmetic number, because the mean of its divisors is an integer number (2663004804096).

Almost surely, 2^{21213610645433} is an apocalyptic number.

It is an amenable number.

21213610645433 is a deficient number, since it is larger than the sum of its proper divisors (90427787335).

21213610645433 is an equidigital number, since it uses as much as digits as its factorization.

21213610645433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91249783.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 21213610645433 in words is "twenty-one trillion, two hundred thirteen billion, six hundred ten million, six hundred forty-five thousand, four hundred thirty-three".