20183286440 has 64 divisors (see below), whose sum is σ = 46149730560. Its totient is φ = 7942717440.

The previous prime is 20183286437. The next prime is 20183286449. The reversal of 20183286440 is 4468238102.

It is a junction number, because it is equal to n+sod(n) for n = 20183286394 and 20183286403.

It is not an unprimeable number, because it can be changed into a prime (20183286449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1375784 + ... + 1390376.

It is an arithmetic number, because the mean of its divisors is an integer number (721089540).

Almost surely, 2^20183286440 is an apocalyptic number.

20183286440 is a gapful number since it is divisible by the number (20) 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 20183286440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23074865280).

20183286440 is an abundant number, since it is smaller than the sum of its proper divisors (25966444120).

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

20183286440 is a wasteful number, since it uses less digits than its factorization.

20183286440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15162 (or 15158 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The spelling of 20183286440 in words is "twenty billion, one hundred eighty-three million, two hundred eighty-six thousand, four hundred forty".