21375070426033 has 4 divisors (see below), whose sum is σ = 21952775032180. Its totient is φ = 20797365819888.

The previous prime is 21375070425983. The next prime is 21375070426037. The reversal of 21375070426033 is 33062407057312.

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 20470484922624 + 904585503409 = 4524432^2 + 951097^2 .

It is a cyclic number.

It is not a de Polignac number, because 21375070426033 - 2¹⁷ = 21375070294961 is a prime.

It is a super-3 number, since 3×21375070426033³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21375070426037) 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, 288852303018 + ... + 288852303091.

It is an arithmetic number, because the mean of its divisors is an integer number (5488193758045).

Almost surely, 2^{21375070426033} is an apocalyptic number.

It is an amenable number.

21375070426033 is a deficient number, since it is larger than the sum of its proper divisors (577704606147).

21375070426033 is an equidigital number, since it uses as much as digits as its factorization.

21375070426033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577704606146.

The product of its (nonzero) digits is 635040, while the sum is 43.

The spelling of 21375070426033 in words is "twenty-one trillion, three hundred seventy-five billion, seventy million, four hundred twenty-six thousand, thirty-three".