21411612533 has 4 divisors (see below), whose sum is σ = 21774521280. Its totient is φ = 21048703788.

The previous prime is 21411612527. The next prime is 21411612559. The reversal of 21411612533 is 33521611412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21411612533 - 2²² = 21407418229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21411612496 and 21411612505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411612133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181454285 + ... + 181454402.

It is an arithmetic number, because the mean of its divisors is an integer number (5443630320).

Almost surely, 2^21411612533 is an apocalyptic number.

It is an amenable number.

21411612533 is a deficient number, since it is larger than the sum of its proper divisors (362908747).

21411612533 is an equidigital number, since it uses as much as digits as its factorization.

21411612533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362908746.

The product of its digits is 4320, while the sum is 29.

The spelling of 21411612533 in words is "twenty-one billion, four hundred eleven million, six hundred twelve thousand, five hundred thirty-three".