18860545850 has 24 divisors (see below), whose sum is σ = 36290294460. Its totient is φ = 7284072320.

The previous prime is 18860545819. The next prime is 18860545883. The reversal of 18860545850 is 5854506881.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 6265197409 + 12595348441 = 79153^2 + 112229^2 .

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a Curzon 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, 6502187 + ... + 6505086.

Almost surely, 2^18860545850 is an apocalyptic number.

18860545850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18860545850 is a deficient number, since it is larger than the sum of its proper divisors (17429748610).

18860545850 is a wasteful number, since it uses less digits than its factorization.

18860545850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13007314 (or 13007309 counting only the distinct ones).

The product of its (nonzero) digits is 1536000, while the sum is 50.

The spelling of 18860545850 in words is "eighteen billion, eight hundred sixty million, five hundred forty-five thousand, eight hundred fifty".