20202020090 has 64 divisors (see below), whose sum is σ = 41849858304. Its totient is φ = 6878020608.

The previous prime is 20202020087. The next prime is 20202020099. The reversal of 20202020090 is 9002020202.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20202020099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6278162 + ... + 6281378.

It is an arithmetic number, because the mean of its divisors is an integer number (653904036).

Almost surely, 2^20202020090 is an apocalyptic number.

20202020090 is an abundant number, since it is smaller than the sum of its proper divisors (21647838214).

20202020090 is a wasteful number, since it uses less digits than its factorization.

20202020090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20202020090 its reverse (9002020202), we get a palindrome (29204040292).

The spelling of 20202020090 in words is "twenty billion, two hundred two million, twenty thousand, ninety".