20850504018 has 16 divisors (see below), whose sum is σ = 41791080576. Its totient is φ = 6935155920.

The previous prime is 20850503909. The next prime is 20850504053. The reversal of 20850504018 is 81040505802.

It is a self number, because there is not a number n which added to its sum of digits gives 20850504018.

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, 3750013 + ... + 3755568.

It is an arithmetic number, because the mean of its divisors is an integer number (2611942536).

Almost surely, 2^20850504018 is an apocalyptic number.

20850504018 is an abundant number, since it is smaller than the sum of its proper divisors (20940576558).

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

20850504018 is a wasteful number, since it uses less digits than its factorization.

20850504018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7506049.

The product of its (nonzero) digits is 12800, while the sum is 33.

The spelling of 20850504018 in words is "twenty billion, eight hundred fifty million, five hundred four thousand, eighteen".