21013329999 has 16 divisors (see below), whose sum is σ = 28679691392. Its totient is φ = 13678162848.

The previous prime is 21013329937. The next prime is 21013330021. The reversal of 21013329999 is 99992331012.

It is not a de Polignac number, because 21013329999 - 2²⁷ = 20879112271 is a prime.

It is a super-3 number, since 3×21013329999³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013321999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348372 + ... + 404214.

It is an arithmetic number, because the mean of its divisors is an integer number (1792480712).

Almost surely, 2^21013329999 is an apocalyptic number.

21013329999 is a deficient number, since it is larger than the sum of its proper divisors (7666361393).

21013329999 is a wasteful number, since it uses less digits than its factorization.

21013329999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58806.

The product of its (nonzero) digits is 236196, while the sum is 48.

The spelling of 21013329999 in words is "twenty-one billion, thirteen million, three hundred twenty-nine thousand, nine hundred ninety-nine".