18211219932 has 24 divisors (see below), whose sum is σ = 42706384000. Its totient is φ = 6039901296.

The previous prime is 18211219903. The next prime is 18211219967. The reversal of 18211219932 is 23991211281.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3810682 + ... + 3815457.

Almost surely, 2^18211219932 is an apocalyptic number.

18211219932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18211219932 is an abundant number, since it is smaller than the sum of its proper divisors (24495164068).

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

18211219932 is a wasteful number, since it uses less digits than its factorization.

18211219932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7626345 (or 7626343 counting only the distinct ones).

The product of its digits is 15552, while the sum is 39.

The spelling of 18211219932 in words is "eighteen billion, two hundred eleven million, two hundred nineteen thousand, nine hundred thirty-two".