21439165010033 has 4 divisors (see below), whose sum is σ = 21528124201188. Its totient is φ = 21350205818880.

The previous prime is 21439165009981. The next prime is 21439165010041. The reversal of 21439165010033 is 33001056193412.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5745143991409 + 15694021018624 = 2396903^2 + 3961568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21439165010033 is a prime.

It is a super-2 number, since 2×21439165010033² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21439165010093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44479595216 + ... + 44479595697.

It is an arithmetic number, because the mean of its divisors is an integer number (5382031050297).

Almost surely, 2^{21439165010033} is an apocalyptic number.

It is an amenable number.

21439165010033 is a deficient number, since it is larger than the sum of its proper divisors (88959191155).

21439165010033 is an equidigital number, since it uses as much as digits as its factorization.

21439165010033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88959191154.

The product of its (nonzero) digits is 58320, while the sum is 38.

The spelling of 21439165010033 in words is "twenty-one trillion, four hundred thirty-nine billion, one hundred sixty-five million, ten thousand, thirty-three".