20562117650 has 24 divisors (see below), whose sum is σ = 38524716180. Its totient is φ = 8164808960.

The previous prime is 20562117649. The next prime is 20562117673. The reversal of 20562117650 is 5671126502.

It can be written as a sum of positive squares in 6 ways, for example, as 8632453921 + 11929663729 = 92911^2 + 109223^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20562117650.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1494035 + ... + 1507734.

Almost surely, 2^20562117650 is an apocalyptic number.

20562117650 is a deficient number, since it is larger than the sum of its proper divisors (17962598530).

20562117650 is a wasteful number, since it uses less digits than its factorization.

20562117650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001918 (or 3001913 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 20562117650 in words is "twenty billion, five hundred sixty-two million, one hundred seventeen thousand, six hundred fifty".