21107042333 has 4 divisors (see below), whose sum is σ = 22730660988. Its totient is φ = 19483423680.

The previous prime is 21107042309. The next prime is 21107042357. The reversal of 21107042333 is 33324070112.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21107042309) and next prime (21107042357).

It can be written as a sum of positive squares in 2 ways, for example, as 8960136964 + 12146905369 = 94658^2 + 110213^2 .

It is a cyclic number.

It is not a de Polignac number, because 21107042333 - 2¹⁶ = 21106976797 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 (21107042833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 811809308 + ... + 811809333.

It is an arithmetic number, because the mean of its divisors is an integer number (5682665247).

Almost surely, 2^21107042333 is an apocalyptic number.

It is an amenable number.

21107042333 is a deficient number, since it is larger than the sum of its proper divisors (1623618655).

21107042333 is a wasteful number, since it uses less digits than its factorization.

21107042333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623618654.

The product of its (nonzero) digits is 3024, while the sum is 26.

The spelling of 21107042333 in words is "twenty-one billion, one hundred seven million, forty-two thousand, three hundred thirty-three".