21167829539 has 8 divisors (see below), whose sum is σ = 21712233840. Its totient is φ = 20629792800.

The previous prime is 21167829523. The next prime is 21167829577. The reversal of 21167829539 is 93592876112.

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 21167829539 - 2⁴ = 21167829523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21167829589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1585157 + ... + 1598454.

It is an arithmetic number, because the mean of its divisors is an integer number (2714029230).

Almost surely, 2^21167829539 is an apocalyptic number.

21167829539 is a deficient number, since it is larger than the sum of its proper divisors (544404301).

21167829539 is a wasteful number, since it uses less digits than its factorization.

21167829539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3183781.

The product of its digits is 1632960, while the sum is 53.

The spelling of 21167829539 in words is "twenty-one billion, one hundred sixty-seven million, eight hundred twenty-nine thousand, five hundred thirty-nine".