21412333643 has 8 divisors (see below), whose sum is σ = 21799604736. Its totient is φ = 21026232000.

The previous prime is 21412333637. The next prime is 21412333673. The reversal of 21412333643 is 34633321412.

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 21412333643 - 2⁴ = 21412333627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21412333673) 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, 255371 + ... + 328692.

It is an arithmetic number, because the mean of its divisors is an integer number (2724950592).

Almost surely, 2^21412333643 is an apocalyptic number.

21412333643 is a deficient number, since it is larger than the sum of its proper divisors (387271093).

21412333643 is an equidigital number, since it uses as much as digits as its factorization.

21412333643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584725.

The product of its digits is 31104, while the sum is 32.

The spelling of 21412333643 in words is "twenty-one billion, four hundred twelve million, three hundred thirty-three thousand, six hundred forty-three".