20033890305 has 64 divisors (see below), whose sum is σ = 37884284928. Its totient is φ = 8912367360.

The previous prime is 20033890277. The next prime is 20033890321. The reversal of 20033890305 is 50309833002.

It is not a de Polignac number, because 20033890305 - 2²⁷ = 19899672577 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, 330252 + ... + 386178.

It is an arithmetic number, because the mean of its divisors is an integer number (591941952).

Almost surely, 2^20033890305 is an apocalyptic number.

It is an amenable number.

20033890305 is a deficient number, since it is larger than the sum of its proper divisors (17850394623).

20033890305 is a wasteful number, since it uses less digits than its factorization.

20033890305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56126.

The product of its (nonzero) digits is 19440, while the sum is 33.

The spelling of 20033890305 in words is "twenty billion, thirty-three million, eight hundred ninety thousand, three hundred five".