18417284444 has 24 divisors (see below), whose sum is σ = 34713262080. Its totient is φ = 8499363264.

The previous prime is 18417284429. The next prime is 18417284447. The reversal of 18417284444 is 44448271481.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18417284447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 787877 + ... + 810915.

It is an arithmetic number, because the mean of its divisors is an integer number (1446385920).

Almost surely, 2^18417284444 is an apocalyptic number.

It is an amenable number.

18417284444 is a deficient number, since it is larger than the sum of its proper divisors (16295977636).

18417284444 is a wasteful number, since it uses less digits than its factorization.

18417284444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38429 (or 38427 counting only the distinct ones).

The product of its digits is 917504, while the sum is 47.

The spelling of 18417284444 in words is "eighteen billion, four hundred seventeen million, two hundred eighty-four thousand, four hundred forty-four".