18440477318 has 8 divisors (see below), whose sum is σ = 27664022880. Its totient is φ = 9219136360.

The previous prime is 18440477311. The next prime is 18440477329. The reversal of 18440477318 is 81377404481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18440477311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530078 + ... + 563793.

It is an arithmetic number, because the mean of its divisors is an integer number (3458002860).

Almost surely, 2^18440477318 is an apocalyptic number.

18440477318 is a deficient number, since it is larger than the sum of its proper divisors (9223545562).

18440477318 is a wasteful number, since it uses less digits than its factorization.

18440477318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102302.

The product of its (nonzero) digits is 602112, while the sum is 47.

The spelling of 18440477318 in words is "eighteen billion, four hundred forty million, four hundred seventy-seven thousand, three hundred eighteen".