21169259013 has 64 divisors (see below), whose sum is σ = 35626926080. Its totient is φ = 10908172800.

The previous prime is 21169259011. The next prime is 21169259017. The reversal of 21169259013 is 31095296112.

It is not a de Polignac number, because 21169259013 - 2¹ = 21169259011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21169259011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 740481 + ... + 768537.

It is an arithmetic number, because the mean of its divisors is an integer number (556670720).

Almost surely, 2^21169259013 is an apocalyptic number.

It is an amenable number.

21169259013 is a deficient number, since it is larger than the sum of its proper divisors (14457667067).

21169259013 is a wasteful number, since it uses less digits than its factorization.

21169259013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28178.

The product of its (nonzero) digits is 29160, while the sum is 39.

The spelling of 21169259013 in words is "twenty-one billion, one hundred sixty-nine million, two hundred fifty-nine thousand, thirteen".