20420420200 has 48 divisors (see below), whose sum is σ = 47796187500. Its totient is φ = 8113336320.

The previous prime is 20420420177. The next prime is 20420420227. The reversal of 20420420200 is 202402402.

It can be written as a sum of positive squares in 6 ways, for example, as 9201797476 + 11218622724 = 95926^2 + 105918^2 .

It is a super-2 number, since 2×20420420200² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312825 + ... + 372424.

Almost surely, 2^20420420200 is an apocalyptic number.

20420420200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20420420200 is an abundant number, since it is smaller than the sum of its proper divisors (27375767300).

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

20420420200 is a wasteful number, since it uses less digits than its factorization.

20420420200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685414 (or 685405 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 20420420200 its reverse (202402402), we get a palindrome (20622822602).

The spelling of 20420420200 in words is "twenty billion, four hundred twenty million, four hundred twenty thousand, two hundred".