20420044200 has 144 divisors (see below), whose sum is σ = 69101604000. Its totient is φ = 5403715200.

The previous prime is 20420044189. The next prime is 20420044213. The reversal of 20420044200 is 244002402.

20420044200 is a `hidden beast` number, since 2 + 0 + 420 + 0 + 44 + 200 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 192501 + ... + 279099.

It is an arithmetic number, because the mean of its divisors is an integer number (479872250).

Almost surely, 2^20420044200 is an apocalyptic number.

20420044200 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 20420044200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34550802000).

20420044200 is an abundant number, since it is smaller than the sum of its proper divisors (48681559800).

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

20420044200 is a wasteful number, since it uses less digits than its factorization.

20420044200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86752 (or 86740 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 20420044200 its reverse (244002402), we get a palindrome (20664046602).

The spelling of 20420044200 in words is "twenty billion, four hundred twenty million, forty-four thousand, two hundred".