20851035204 has 48 divisors (see below), whose sum is σ = 52139864448. Its totient is φ = 6468473088.

The previous prime is 20851035203. The next prime is 20851035217. The reversal of 20851035204 is 40253015802.

It is not an unprimeable number, because it can be changed into a prime (20851035203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1010697 + ... + 1031120.

It is an arithmetic number, because the mean of its divisors is an integer number (1086247176).

Almost surely, 2^20851035204 is an apocalyptic number.

It is an amenable number.

20851035204 is an abundant number, since it is smaller than the sum of its proper divisors (31288829244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20851035204 is a wasteful number, since it uses less digits than its factorization.

20851035204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041884 (or 2041882 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 20851035204 in words is "twenty billion, eight hundred fifty-one million, thirty-five thousand, two hundred four".