20500335550 has 12 divisors (see below), whose sum is σ = 38130624216. Its totient is φ = 8200134200.

The previous prime is 20500335523. The next prime is 20500335563. The reversal of 20500335550 is 5553300502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 205003306 + ... + 205003405.

It is an arithmetic number, because the mean of its divisors is an integer number (3177552018).

Almost surely, 2^20500335550 is an apocalyptic number.

20500335550 is a deficient number, since it is larger than the sum of its proper divisors (17630288666).

20500335550 is a wasteful number, since it uses less digits than its factorization.

20500335550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410006723 (or 410006718 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 28.

The spelling of 20500335550 in words is "twenty billion, five hundred million, three hundred thirty-five thousand, five hundred fifty".