20004220420 has 48 divisors (see below), whose sum is σ = 42564936960. Its totient is φ = 7895886336.

The previous prime is 20004220409. The next prime is 20004220429. The reversal of 20004220420 is 2402240002.

It is a super-2 number, since 2×20004220420² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20004220394 and 20004220403.

It is not an unprimeable number, because it can be changed into a prime (20004220429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4679404 + ... + 4683676.

It is an arithmetic number, because the mean of its divisors is an integer number (886769520).

Almost surely, 2^20004220420 is an apocalyptic number.

20004220420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20004220420 is an abundant number, since it is smaller than the sum of its proper divisors (22560716540).

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

20004220420 is a wasteful number, since it uses less digits than its factorization.

20004220420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7324 (or 7322 counting only the distinct ones).

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

Adding to 20004220420 its reverse (2402240002), we get a palindrome (22406460422).

The spelling of 20004220420 in words is "twenty billion, four million, two hundred twenty thousand, four hundred twenty".