11420204420 has 24 divisors (see below), whose sum is σ = 24025509144. Its totient is φ = 4559876096.

The previous prime is 11420204381. The next prime is 11420204447. The reversal of 11420204420 is 2440202411.

It can be written as a sum of positive squares in 4 ways, for example, as 204547204 + 11215657216 = 14302^2 + 105904^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11420204392 and 11420204401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501437 + ... + 523716.

It is an arithmetic number, because the mean of its divisors is an integer number (1001062881).

Almost surely, 2^11420204420 is an apocalyptic number.

11420204420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11420204420 is an abundant number, since it is smaller than the sum of its proper divisors (12605304724).

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

11420204420 is a wasteful number, since it uses less digits than its factorization.

11420204420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025719 (or 1025717 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 11420204420 its reverse (2440202411), we get a palindrome (13860406831).

The spelling of 11420204420 in words is "eleven billion, four hundred twenty million, two hundred four thousand, four hundred twenty".