18477740736 has 840 divisors, whose sum is σ = 71271408384. Its totient is φ = 4625786880.

The previous prime is 18477740731. The next prime is 18477740761. The reversal of 18477740736 is 63704777481.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18477740731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 141051391 + ... + 141051521.

Almost surely, 2^18477740736 is an apocalyptic number.

18477740736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18477740736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35635704192).

18477740736 is an abundant number, since it is smaller than the sum of its proper divisors (52793667648).

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

18477740736 is a wasteful number, since it uses less digits than its factorization.

18477740736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 5531904, while the sum is 54.

The spelling of 18477740736 in words is "eighteen billion, four hundred seventy-seven million, seven hundred forty thousand, seven hundred thirty-six".