21675047138467 has 32 divisors (see below), whose sum is σ = 23626021809600. Its totient is φ = 19808497287168.

The previous prime is 21675047138461. The next prime is 21675047138551. The reversal of 21675047138467 is 76483174057612.

It is a cyclic number.

It is not a de Polignac number, because 21675047138467 - 2³⁵ = 21640687400099 is a prime.

It is a super-2 number, since 2×21675047138467² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21675047138461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49302273 + ... + 49739965.

It is an arithmetic number, because the mean of its divisors is an integer number (738313181550).

Almost surely, 2^{21675047138467} is an apocalyptic number.

21675047138467 is a deficient number, since it is larger than the sum of its proper divisors (1950974671133).

21675047138467 is a wasteful number, since it uses less digits than its factorization.

21675047138467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438375.

The product of its (nonzero) digits is 47416320, while the sum is 61.

The spelling of 21675047138467 in words is "twenty-one trillion, six hundred seventy-five billion, forty-seven million, one hundred thirty-eight thousand, four hundred sixty-seven".