20113506550 has 24 divisors (see below), whose sum is σ = 37500023952. Its totient is φ = 8026284000.

The previous prime is 20113506541. The next prime is 20113506577. The reversal of 20113506550 is 5560531102.

It is a congruent number.

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, 456706 + ... + 498805.

It is an arithmetic number, because the mean of its divisors is an integer number (1562500998).

Almost surely, 2^20113506550 is an apocalyptic number.

20113506550 is a deficient number, since it is larger than the sum of its proper divisors (17386517402).

20113506550 is a wasteful number, since it uses less digits than its factorization.

20113506550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955944 (or 955939 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 20113506550 in words is "twenty billion, one hundred thirteen million, five hundred six thousand, five hundred fifty".