21106147333 has 4 divisors (see below), whose sum is σ = 21108094048. Its totient is φ = 21104200620.

The previous prime is 21106147319. The next prime is 21106147339. The reversal of 21106147333 is 33374160112.

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 21106147333 - 2²⁹ = 20569276421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21106147295 and 21106147304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21106147339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 957003 + ... + 978808.

It is an arithmetic number, because the mean of its divisors is an integer number (5277023512).

Almost surely, 2^21106147333 is an apocalyptic number.

It is an amenable number.

21106147333 is a deficient number, since it is larger than the sum of its proper divisors (1946715).

21106147333 is a wasteful number, since it uses less digits than its factorization.

21106147333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946714.

The product of its (nonzero) digits is 9072, while the sum is 31.

The spelling of 21106147333 in words is "twenty-one billion, one hundred six million, one hundred forty-seven thousand, three hundred thirty-three".