18441978148 has 24 divisors (see below), whose sum is σ = 37278438624. Its totient is φ = 7889616000.

The previous prime is 18441978127. The next prime is 18441978253. The reversal of 18441978148 is 84187914481.

It is a super-3 number, since 3×18441978148³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12326778 + ... + 12328273.

It is an arithmetic number, because the mean of its divisors is an integer number (1553268276).

Almost surely, 2^18441978148 is an apocalyptic number.

It is an amenable number.

18441978148 is an abundant number, since it is smaller than the sum of its proper divisors (18836460476).

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

18441978148 is a wasteful number, since it uses less digits than its factorization.

18441978148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24655083 (or 24655081 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 55.

The spelling of 18441978148 in words is "eighteen billion, four hundred forty-one million, nine hundred seventy-eight thousand, one hundred forty-eight".