21245826359 has 4 divisors (see below), whose sum is σ = 21376169016. Its totient is φ = 21115483704.

The previous prime is 21245826337. The next prime is 21245826379. The reversal of 21245826359 is 95362854212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21245826359 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 (21245826379) 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 3 ways as a sum of consecutive naturals, for example, 65171084 + ... + 65171409.

It is an arithmetic number, because the mean of its divisors is an integer number (5344042254).

Almost surely, 2^21245826359 is an apocalyptic number.

21245826359 is a deficient number, since it is larger than the sum of its proper divisors (130342657).

21245826359 is a wasteful number, since it uses less digits than its factorization.

21245826359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130342656.

The product of its digits is 1036800, while the sum is 47.

The spelling of 21245826359 in words is "twenty-one billion, two hundred forty-five million, eight hundred twenty-six thousand, three hundred fifty-nine".