21534266793017 has 8 divisors (see below), whose sum is σ = 23890095672480. Its totient is φ = 19244799290560.

The previous prime is 21534266792999. The next prime is 21534266793023. The reversal of 21534266793017 is 71039766243512.

It is a happy number.

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 21534266793017 - 2⁸ = 21534266792761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21534266793517) 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, 16590343568 + ... + 16590344865.

It is an arithmetic number, because the mean of its divisors is an integer number (2986261959060).

Almost surely, 2^{21534266793017} is an apocalyptic number.

It is an amenable number.

21534266793017 is a deficient number, since it is larger than the sum of its proper divisors (2355828879463).

21534266793017 is a wasteful number, since it uses less digits than its factorization.

21534266793017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33180688503.

The product of its (nonzero) digits is 11430720, while the sum is 56.

The spelling of 21534266793017 in words is "twenty-one trillion, five hundred thirty-four billion, two hundred sixty-six million, seven hundred ninety-three thousand, seventeen".