20022002197 has 16 divisors (see below), whose sum is σ = 20595985200. Its totient is φ = 19452303360.

The previous prime is 20022002179. The next prime is 20022002227. The reversal of 20022002197 is 79120022002.

It can be written as a sum of positive squares in 8 ways, for example, as 328370641 + 19693631556 = 18121^2 + 140334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20022002197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022002107) 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, 15532329 + ... + 15533617.

It is an arithmetic number, because the mean of its divisors is an integer number (1287249075).

Almost surely, 2^20022002197 is an apocalyptic number.

It is an amenable number.

20022002197 is a deficient number, since it is larger than the sum of its proper divisors (573983003).

20022002197 is a wasteful number, since it uses less digits than its factorization.

20022002197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 20022002197 its reverse (79120022002), we get a palindrome (99142024199).

The spelling of 20022002197 in words is "twenty billion, twenty-two million, two thousand, one hundred ninety-seven".