18899899906 has 64 divisors (see below), whose sum is σ = 31924368000. Its totient is φ = 8339328000.

The previous prime is 18899899901. The next prime is 18899899937. The reversal of 18899899906 is 60999899881.

It is not an unprimeable number, because it can be changed into a prime (18899899901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37131180 + ... + 37131688.

It is an arithmetic number, because the mean of its divisors is an integer number (498818250).

Almost surely, 2^18899899906 is an apocalyptic number.

18899899906 is a deficient number, since it is larger than the sum of its proper divisors (13024468094).

18899899906 is a wasteful number, since it uses less digits than its factorization.

18899899906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027.

The product of its (nonzero) digits is 181398528, while the sum is 76.

The spelling of 18899899906 in words is "eighteen billion, eight hundred ninety-nine million, eight hundred ninety-nine thousand, nine hundred six".