21073831559 has 16 divisors (see below), whose sum is σ = 23358461184. Its totient is φ = 18851716800.

The previous prime is 21073831529. The next prime is 21073831609. The reversal of 21073831559 is 95513837012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21073831559 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 (21073831529) 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, 382667 + ... + 434259.

It is an arithmetic number, because the mean of its divisors is an integer number (1459903824).

Almost surely, 2^21073831559 is an apocalyptic number.

21073831559 is a deficient number, since it is larger than the sum of its proper divisors (2284629625).

21073831559 is a wasteful number, since it uses less digits than its factorization.

21073831559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52198.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 21073831559 in words is "twenty-one billion, seventy-three million, eight hundred thirty-one thousand, five hundred fifty-nine".