18580195850 has 12 divisors (see below), whose sum is σ = 34559164374. Its totient is φ = 7432078320.

The previous prime is 18580195847. The next prime is 18580195891. The reversal of 18580195850 is 5859108581.

It can be written as a sum of positive squares in 3 ways, for example, as 17966989681 + 613206169 = 134041^2 + 24763^2 .

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 371603917 = 18580195850 / (1 + 8 + 5 + 8 + 0 + 1 + 9 + 5 + 8 + 5 + 0).

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, 185801909 + ... + 185802008.

Almost surely, 2^18580195850 is an apocalyptic number.

18580195850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18580195850 is a deficient number, since it is larger than the sum of its proper divisors (15978968524).

18580195850 is a wasteful number, since it uses less digits than its factorization.

18580195850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371603929 (or 371603924 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 50.

The spelling of 18580195850 in words is "eighteen billion, five hundred eighty million, one hundred ninety-five thousand, eight hundred fifty".