200020420 has 24 divisors (see below), whose sum is σ = 438306624. Its totient is φ = 76529376.

The previous prime is 200020417. The next prime is 200020433. The reversal of 200020420 is 24020002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 200020397 and 200020406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216954 + ... + 217873.

It is an arithmetic number, because the mean of its divisors is an integer number (18262776).

Almost surely, 2^200020420 is an apocalyptic number.

200020420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200020420 is an abundant number, since it is smaller than the sum of its proper divisors (238286204).

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

200020420 is a wasteful number, since it uses less digits than its factorization.

200020420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434859 (or 434857 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 200020420 is about 14142.8575613276. The cubic root of 200020420 is about 584.8234497793.

Adding to 200020420 its reverse (24020002), we get a palindrome (224040422).

The spelling of 200020420 in words is "two hundred million, twenty thousand, four hundred twenty".