18902219052 has 12 divisors (see below), whose sum is σ = 44105177816. Its totient is φ = 6300739680.

The previous prime is 18902219051. The next prime is 18902219069. The reversal of 18902219052 is 25091220981.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 18902219052.

It is not an unprimeable number, because it can be changed into a prime (18902219051) 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 3 ways as a sum of consecutive naturals, for example, 787592449 + ... + 787592472.

Almost surely, 2^18902219052 is an apocalyptic number.

18902219052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18902219052 is an abundant number, since it is smaller than the sum of its proper divisors (25202958764).

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

18902219052 is a wasteful number, since it uses less digits than its factorization.

18902219052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575184928 (or 1575184926 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The spelling of 18902219052 in words is "eighteen billion, nine hundred two million, two hundred nineteen thousand, fifty-two".