21213965167 has 8 divisors (see below), whose sum is σ = 22364209152. Its totient is φ = 20092841400.

The previous prime is 21213965141. The next prime is 21213965197. The reversal of 21213965167 is 76156931212.

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 21213965167 - 2¹⁹ = 21213440879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213965197) 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, 7278559 + ... + 7281472.

It is an arithmetic number, because the mean of its divisors is an integer number (2795526144).

Almost surely, 2^21213965167 is an apocalyptic number.

21213965167 is a deficient number, since it is larger than the sum of its proper divisors (1150243985).

21213965167 is a wasteful number, since it uses less digits than its factorization.

21213965167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14560109.

The product of its digits is 136080, while the sum is 43.

The spelling of 21213965167 in words is "twenty-one billion, two hundred thirteen million, nine hundred sixty-five thousand, one hundred sixty-seven".