18998523468 has 36 divisors (see below), whose sum is σ = 50848990920. Its totient is φ = 5960320896.

The previous prime is 18998523463. The next prime is 18998523469. The reversal of 18998523468 is 86432589981.

18998523468 is a `hidden beast` number, since 1 + 8 + 99 + 85 + 2 + 3 + 468 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (18998523463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15521058 + ... + 15522281.

It is an arithmetic number, because the mean of its divisors is an integer number (1412471970).

Almost surely, 2^18998523468 is an apocalyptic number.

18998523468 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18998523468 is an abundant number, since it is smaller than the sum of its proper divisors (31850467452).

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

18998523468 is a wasteful number, since it uses less digits than its factorization.

18998523468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31043366 (or 31043361 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The spelling of 18998523468 in words is "eighteen billion, nine hundred ninety-eight million, five hundred twenty-three thousand, four hundred sixty-eight".