20005503305 has 16 divisors (see below), whose sum is σ = 24720933888. Its totient is φ = 15532272000.

The previous prime is 20005503269. The next prime is 20005503337. The reversal of 20005503305 is 50330550002.

It is a happy number.

It is not a de Polignac number, because 20005503305 - 2⁶ = 20005503241 is a prime.

It is a Duffinian number.

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, 216311 + ... + 294620.

It is an arithmetic number, because the mean of its divisors is an integer number (1545058368).

Almost surely, 2^20005503305 is an apocalyptic number.

It is an amenable number.

20005503305 is a deficient number, since it is larger than the sum of its proper divisors (4715430583).

20005503305 is a wasteful number, since it uses less digits than its factorization.

20005503305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511168.

The product of its (nonzero) digits is 2250, while the sum is 23.

The spelling of 20005503305 in words is "twenty billion, five million, five hundred three thousand, three hundred five".