21604067351033 has 8 divisors (see below), whose sum is σ = 21621588878208. Its totient is φ = 21586549237344.

The previous prime is 21604067351023. The next prime is 21604067351093. The reversal of 21604067351033 is 33015376040612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21604067351033 - 2⁸ = 21604067350777 is a prime.

It is a super-2 number, since 2×21604067351033² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21604067351023) 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 7 ways as a sum of consecutive naturals, for example, 11886860 + ... + 13583282.

It is an arithmetic number, because the mean of its divisors is an integer number (2702698609776).

Almost surely, 2^{21604067351033} is an apocalyptic number.

It is an amenable number.

21604067351033 is a deficient number, since it is larger than the sum of its proper divisors (17521527175).

21604067351033 is a wasteful number, since it uses less digits than its factorization.

21604067351033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706743.

The product of its (nonzero) digits is 272160, while the sum is 41.

The spelling of 21604067351033 in words is "twenty-one trillion, six hundred four billion, sixty-seven million, three hundred fifty-one thousand, thirty-three".