21167373306 has 16 divisors (see below), whose sum is σ = 43133516064. Its totient is φ = 6922662864.

The previous prime is 21167373299. The next prime is 21167373313. The reversal of 21167373306 is 60337376112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21167373299) and next prime (21167373313).

It is a super-3 number, since 3×21167373306³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

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, 33281716 + ... + 33282351.

It is an arithmetic number, because the mean of its divisors is an integer number (2695844754).

Almost surely, 2^21167373306 is an apocalyptic number.

21167373306 is an abundant number, since it is smaller than the sum of its proper divisors (21966142758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21167373306 is a wasteful number, since it uses less digits than its factorization.

21167373306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66564125.

The product of its (nonzero) digits is 95256, while the sum is 39.

The spelling of 21167373306 in words is "twenty-one billion, one hundred sixty-seven million, three hundred seventy-three thousand, three hundred six".