20850850428 has 24 divisors (see below), whose sum is σ = 48855555840. Its totient is φ = 6921201840.

The previous prime is 20850850411. The next prime is 20850850451. The reversal of 20850850428 is 82405805802.

It is a self number, because there is not a number n which added to its sum of digits gives 20850850428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3632218 + ... + 3637953.

It is an arithmetic number, because the mean of its divisors is an integer number (2035648160).

Almost surely, 2^20850850428 is an apocalyptic number.

It is an amenable number.

20850850428 is an abundant number, since it is smaller than the sum of its proper divisors (28004705412).

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

20850850428 is a wasteful number, since it uses less digits than its factorization.

20850850428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7270417 (or 7270415 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 42.

The spelling of 20850850428 in words is "twenty billion, eight hundred fifty million, eight hundred fifty thousand, four hundred twenty-eight".