20402330202 has 12 divisors (see below), whose sum is σ = 44205048810. Its totient is φ = 6800776728.

The previous prime is 20402330189. The next prime is 20402330203. The reversal of 20402330202 is 20203320402.

It can be written as a sum of positive squares in only one way, i.e., 12456568881 + 7945761321 = 111609^2 + 89139^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1133462789 = 20402330202 / (2 + 0 + 4 + 0 + 2 + 3 + 3 + 0 + 2 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (20402330203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 566731377 + ... + 566731412.

Almost surely, 2^20402330202 is an apocalyptic number.

20402330202 is an abundant number, since it is smaller than the sum of its proper divisors (23802718608).

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

20402330202 is a wasteful number, since it uses less digits than its factorization.

20402330202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133462797 (or 1133462794 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

Adding to 20402330202 its reverse (20203320402), we get a palindrome (40605650604).

The spelling of 20402330202 in words is "twenty billion, four hundred two million, three hundred thirty thousand, two hundred two".