21612296359 has 4 divisors (see below), whose sum is σ = 21613124016. Its totient is φ = 21611468704.

The previous prime is 21612296353. The next prime is 21612296369. The reversal of 21612296359 is 95369221612.

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

It is a cyclic number.

It is not a de Polignac number, because 21612296359 - 2⁵ = 21612296327 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 (21612296353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373339 + ... + 427324.

It is an arithmetic number, because the mean of its divisors is an integer number (5403281004).

Almost surely, 2^21612296359 is an apocalyptic number.

21612296359 is a deficient number, since it is larger than the sum of its proper divisors (827657).

21612296359 is an equidigital number, since it uses as much as digits as its factorization.

21612296359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827656.

The product of its digits is 349920, while the sum is 46.

It can be divided in two parts, 216122 and 96359, that added together give a square (312481 = 559²).

The spelling of 21612296359 in words is "twenty-one billion, six hundred twelve million, two hundred ninety-six thousand, three hundred fifty-nine".