20947525850 has 12 divisors (see below), whose sum is σ = 38962398174. Its totient is φ = 8379010320.

The previous prime is 20947525829. The next prime is 20947525853. The reversal of 20947525850 is 5852574902.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 18318810409 + 2628715441 = 135347^2 + 51271^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20947525795 and 20947525804.

It is not an unprimeable number, because it can be changed into a prime (20947525853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209475209 + ... + 209475308.

Almost surely, 2^20947525850 is an apocalyptic number.

20947525850 is a deficient number, since it is larger than the sum of its proper divisors (18014872324).

20947525850 is a wasteful number, since it uses less digits than its factorization.

20947525850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418950529 (or 418950524 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 20947525850 in words is "twenty billion, nine hundred forty-seven million, five hundred twenty-five thousand, eight hundred fifty".