18744472782 has 48 divisors (see below), whose sum is σ = 49145177952. Its totient is φ = 5040529920.

The previous prime is 18744472711. The next prime is 18744472787. The reversal of 18744472782 is 28727444781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18744472787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4373319 + ... + 4377602.

It is an arithmetic number, because the mean of its divisors is an integer number (1023857874).

Almost surely, 2^18744472782 is an apocalyptic number.

18744472782 is an abundant number, since it is smaller than the sum of its proper divisors (30400705170).

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

18744472782 is a wasteful number, since it uses less digits than its factorization.

18744472782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8750953 (or 8750950 counting only the distinct ones).

The product of its digits is 5619712, while the sum is 54.

The spelling of 18744472782 in words is "eighteen billion, seven hundred forty-four million, four hundred seventy-two thousand, seven hundred eighty-two".