202220402420 has 12 divisors (see below), whose sum is σ = 424662845124. Its totient is φ = 80888160960.

The previous prime is 202220402339. The next prime is 202220402467. The reversal of 202220402420 is 24204022202.

It can be written as a sum of positive squares in 2 ways, for example, as 63772411024 + 138447991396 = 252532^2 + 372086^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 10111020121 = 202220402420 / (2 + 0 + 2 + 2 + 2 + 0 + 4 + 0 + 2 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 202220402392 and 202220402401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5055510041 + ... + 5055510080.

It is an arithmetic number, because the mean of its divisors is an integer number (35388570427).

Almost surely, 2^202220402420 is an apocalyptic number.

202220402420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202220402420 is an abundant number, since it is smaller than the sum of its proper divisors (222442442704).

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

202220402420 is a wasteful number, since it uses less digits than its factorization.

202220402420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10111020130 (or 10111020128 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 202220402420 its reverse (24204022202), we get a palindrome (226424424622).

The spelling of 202220402420 in words is "two hundred two billion, two hundred twenty million, four hundred two thousand, four hundred twenty".