20420104200 has 144 divisors (see below), whose sum is σ = 67245599280. Its totient is φ = 5125002240.

The previous prime is 20420104169. The next prime is 20420104249. The reversal of 20420104200 is 240102402.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20420104200.

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, 114519 + ... + 232281.

Almost surely, 2^20420104200 is an apocalyptic number.

20420104200 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 20420104200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33622799640).

20420104200 is an abundant number, since it is smaller than the sum of its proper divisors (46825495080).

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

20420104200 is a wasteful number, since it uses less digits than its factorization.

20420104200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117816 (or 117790 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 20420104200 its reverse (240102402), we get a palindrome (20660206602).

The spelling of 20420104200 in words is "twenty billion, four hundred twenty million, one hundred four thousand, two hundred".