21073539289 has 8 divisors (see below), whose sum is σ = 22990546080. Its totient is φ = 19156737600.

The previous prime is 21073539239. The next prime is 21073539391. The reversal of 21073539289 is 98293537012.

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

It is not a de Polignac number, because 21073539289 - 2²³ = 21065150681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21073539239) 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, 231297 + ... + 309265.

It is an arithmetic number, because the mean of its divisors is an integer number (2873818260).

Almost surely, 2^21073539289 is an apocalyptic number.

It is an amenable number.

21073539289 is a deficient number, since it is larger than the sum of its proper divisors (1917006791).

21073539289 is a wasteful number, since it uses less digits than its factorization.

21073539289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102551.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 21073539289 in words is "twenty-one billion, seventy-three million, five hundred thirty-nine thousand, two hundred eighty-nine".