20058009905 has 8 divisors (see below), whose sum is σ = 24093759912. Its totient is φ = 16030309248.

The previous prime is 20058009893. The next prime is 20058009913. The reversal of 20058009905 is 50990085002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11561410576 + 8496599329 = 107524^2 + 92177^2 .

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 20058009905 - 2⁸ = 20058009649 is a prime.

It is a super-2 number, since 2×20058009905² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2006852 + ... + 2016821.

It is an arithmetic number, because the mean of its divisors is an integer number (3011719989).

Almost surely, 2^20058009905 is an apocalyptic number.

It is an amenable number.

20058009905 is a deficient number, since it is larger than the sum of its proper divisors (4035750007).

20058009905 is an equidigital number, since it uses as much as digits as its factorization.

20058009905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4024675.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 20058009905 in words is "twenty billion, fifty-eight million, nine thousand, nine hundred five".