20599315905 has 32 divisors (see below), whose sum is σ = 39883048704. Its totient is φ = 8862898176.

The previous prime is 20599315889. The next prime is 20599315909. The reversal of 20599315905 is 50951399502.

It is not a de Polignac number, because 20599315905 - 2⁴ = 20599315889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20599315909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5768332 + ... + 5771901.

It is an arithmetic number, because the mean of its divisors is an integer number (1246345272).

Almost surely, 2^20599315905 is an apocalyptic number.

It is an amenable number.

20599315905 is a deficient number, since it is larger than the sum of its proper divisors (19283732799).

20599315905 is a wasteful number, since it uses less digits than its factorization.

20599315905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11540265.

The product of its (nonzero) digits is 546750, while the sum is 48.

The spelling of 20599315905 in words is "twenty billion, five hundred ninety-nine million, three hundred fifteen thousand, nine hundred five".