20344010505 has 64 divisors (see below), whose sum is σ = 42170634240. Its totient is φ = 8132887296.

The previous prime is 20344010503. The next prime is 20344010569. The reversal of 20344010505 is 50501044302.

It is not a de Polignac number, because 20344010505 - 2¹ = 20344010503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20344010503) 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, 366277 + ... + 418146.

It is an arithmetic number, because the mean of its divisors is an integer number (658916160).

Almost surely, 2^20344010505 is an apocalyptic number.

It is an amenable number.

20344010505 is an abundant number, since it is smaller than the sum of its proper divisors (21826623735).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20344010505 is a wasteful number, since it uses less digits than its factorization.

20344010505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784470.

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 20344010505 its reverse (50501044302), we get a palindrome (70845054807).

The spelling of 20344010505 in words is "twenty billion, three hundred forty-four million, ten thousand, five hundred five".