20005133505 has 16 divisors (see below), whose sum is σ = 36580815744. Its totient is φ = 9145203840.

The previous prime is 20005133479. The next prime is 20005133521. The reversal of 20005133505 is 50533150002.

It is not a de Polignac number, because 20005133505 - 2⁶ = 20005133441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95262436 + ... + 95262645.

It is an arithmetic number, because the mean of its divisors is an integer number (2286300984).

Almost surely, 2^20005133505 is an apocalyptic number.

It is an amenable number.

20005133505 is a deficient number, since it is larger than the sum of its proper divisors (16575682239).

20005133505 is a wasteful number, since it uses less digits than its factorization.

20005133505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190525096.

The product of its (nonzero) digits is 2250, while the sum is 24.

Adding to 20005133505 its reverse (50533150002), we get a palindrome (70538283507).

The spelling of 20005133505 in words is "twenty billion, five million, one hundred thirty-three thousand, five hundred five".