20434325505 has 64 divisors (see below), whose sum is σ = 37339011072. Its totient is φ = 9445962240.

The previous prime is 20434325411. The next prime is 20434325537. The reversal of 20434325505 is 50552343402.

It is a happy number.

It is not a de Polignac number, because 20434325505 - 2⁹ = 20434324993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1179234 + ... + 1196436.

It is an arithmetic number, because the mean of its divisors is an integer number (583422048).

Almost surely, 2^20434325505 is an apocalyptic number.

It is an amenable number.

20434325505 is a deficient number, since it is larger than the sum of its proper divisors (16904685567).

20434325505 is a wasteful number, since it uses less digits than its factorization.

20434325505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17558.

The product of its (nonzero) digits is 72000, while the sum is 33.

Adding to 20434325505 its reverse (50552343402), we get a palindrome (70986668907).

The spelling of 20434325505 in words is "twenty billion, four hundred thirty-four million, three hundred twenty-five thousand, five hundred five".