20344550305 has 8 divisors (see below), whose sum is σ = 24418265832. Its totient is φ = 16272436608.

The previous prime is 20344550297. The next prime is 20344550321. The reversal of 20344550305 is 50305544302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1643167296 + 18701383009 = 40536^2 + 136753^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20344550305 - 2³ = 20344550297 is a prime.

It is a super-2 number, since 2×20344550305² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372334 + ... + 423463.

It is an arithmetic number, because the mean of its divisors is an integer number (3052283229).

Almost surely, 2^20344550305 is an apocalyptic number.

It is an amenable number.

20344550305 is a deficient number, since it is larger than the sum of its proper divisors (4073715527).

20344550305 is an equidigital number, since it uses as much as digits as its factorization.

20344550305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800915.

The product of its (nonzero) digits is 36000, while the sum is 31.

The spelling of 20344550305 in words is "twenty billion, three hundred forty-four million, five hundred fifty thousand, three hundred five".