20185808204 has 6 divisors (see below), whose sum is σ = 35325164364. Its totient is φ = 10092904100.

The previous prime is 20185808197. The next prime is 20185808219. The reversal of 20185808204 is 40280858102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2523226022 + ... + 2523226029.

It is an arithmetic number, because the mean of its divisors is an integer number (5887527394).

Almost surely, 2^20185808204 is an apocalyptic number.

It is an amenable number.

20185808204 is a deficient number, since it is larger than the sum of its proper divisors (15139356160).

20185808204 is a wasteful number, since it uses less digits than its factorization.

20185808204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5046452055 (or 5046452053 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 38.

The spelling of 20185808204 in words is "twenty billion, one hundred eighty-five million, eight hundred eight thousand, two hundred four".