18595505650 has 12 divisors (see below), whose sum is σ = 34587640602. Its totient is φ = 7438202240.

The previous prime is 18595505633. The next prime is 18595505653. The reversal of 18595505650 is 5650559581.

It can be written as a sum of positive squares in 3 ways, for example, as 12486051081 + 6109454569 = 111741^2 + 78163^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18595505594 and 18595505603.

It is not an unprimeable number, because it can be changed into a prime (18595505653) 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, 185955007 + ... + 185955106.

Almost surely, 2^18595505650 is an apocalyptic number.

18595505650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18595505650 is a deficient number, since it is larger than the sum of its proper divisors (15992134952).

18595505650 is a wasteful number, since it uses less digits than its factorization.

18595505650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371910125 (or 371910120 counting only the distinct ones).

The product of its (nonzero) digits is 1350000, while the sum is 49.

The spelling of 18595505650 in words is "eighteen billion, five hundred ninety-five million, five hundred five thousand, six hundred fifty".