18616038850 has 12 divisors (see below), whose sum is σ = 34625832354. Its totient is φ = 7446415520.

The previous prime is 18616038829. The next prime is 18616038911. The reversal of 18616038850 is 5883061681.

It can be written as a sum of positive squares in 3 ways, for example, as 12650175729 + 5965863121 = 112473^2 + 77239^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18616038850.

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, 186160339 + ... + 186160438.

Almost surely, 2^18616038850 is an apocalyptic number.

18616038850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18616038850 is a deficient number, since it is larger than the sum of its proper divisors (16009793504).

18616038850 is a wasteful number, since it uses less digits than its factorization.

18616038850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372320789 (or 372320784 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 18616038850 in words is "eighteen billion, six hundred sixteen million, thirty-eight thousand, eight hundred fifty".