20183469840 has 400 divisors, whose sum is σ = 71947180800. Its totient is φ = 5242558464.

The previous prime is 20183469829. The next prime is 20183469883. The reversal of 20183469840 is 4896438102.

It is a happy number.

20183469840 is a `hidden beast` number, since 2 + 0 + 183 + 469 + 8 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 45560659 + ... + 45561101.

It is an arithmetic number, because the mean of its divisors is an integer number (179867952).

Almost surely, 2^20183469840 is an apocalyptic number.

20183469840 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 20183469840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35973590400).

20183469840 is an abundant number, since it is smaller than the sum of its proper divisors (51763710960).

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

20183469840 is a wasteful number, since it uses less digits than its factorization.

20183469840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 20183469840 in words is "twenty billion, one hundred eighty-three million, four hundred sixty-nine thousand, eight hundred forty".