21317269136033 has 4 divisors (see below), whose sum is σ = 22957059069588. Its totient is φ = 19677479202480.

The previous prime is 21317269135973. The next prime is 21317269136041. The reversal of 21317269136033 is 33063196271312.

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 8841482212369 + 12475786923664 = 2973463^2 + 3532108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21317269136033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21317269136533) 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, 819894966758 + ... + 819894966783.

It is an arithmetic number, because the mean of its divisors is an integer number (5739264767397).

Almost surely, 2^{21317269136033} is an apocalyptic number.

It is an amenable number.

21317269136033 is a deficient number, since it is larger than the sum of its proper divisors (1639789933555).

21317269136033 is a wasteful number, since it uses less digits than its factorization.

21317269136033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639789933554.

The product of its (nonzero) digits is 734832, while the sum is 47.

The spelling of 21317269136033 in words is "twenty-one trillion, three hundred seventeen billion, two hundred sixty-nine million, one hundred thirty-six thousand, thirty-three".