18581996106 has 16 divisors (see below), whose sum is σ = 41293324800. Its totient is φ = 6193998684.

The previous prime is 18581996071. The next prime is 18581996113. The reversal of 18581996106 is 60169918581.

18581996106 is a `hidden beast` number, since 1 + 8 + 5 + 8 + 19 + 9 + 610 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 344111039 = 18581996106 / (1 + 8 + 5 + 8 + 1 + 9 + 9 + 6 + 1 + 0 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172055466 + ... + 172055573.

It is an arithmetic number, because the mean of its divisors is an integer number (2580832800).

Almost surely, 2^18581996106 is an apocalyptic number.

18581996106 is an abundant number, since it is smaller than the sum of its proper divisors (22711328694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18581996106 is a wasteful number, since it uses less digits than its factorization.

18581996106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344111050 (or 344111044 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 54.

The spelling of 18581996106 in words is "eighteen billion, five hundred eighty-one million, nine hundred ninety-six thousand, one hundred six".