21679117467 has 8 divisors (see below), whose sum is σ = 33034845696. Its totient is φ = 12388067112.

The previous prime is 21679117409. The next prime is 21679117469. The reversal of 21679117467 is 76471197612.

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

It is not a de Polignac number, because 21679117467 - 2²² = 21674923163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21679117469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516169443 + ... + 516169484.

It is an arithmetic number, because the mean of its divisors is an integer number (4129355712).

Almost surely, 2^21679117467 is an apocalyptic number.

21679117467 is a deficient number, since it is larger than the sum of its proper divisors (11355728229).

21679117467 is a wasteful number, since it uses less digits than its factorization.

21679117467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032338937.

The product of its digits is 889056, while the sum is 51.

The spelling of 21679117467 in words is "twenty-one billion, six hundred seventy-nine million, one hundred seventeen thousand, four hundred sixty-seven".