20310202197 has 12 divisors (see below), whose sum is σ = 30423513120. Its totient is φ = 13540134636.

The previous prime is 20310202183. The next prime is 20310202207. The reversal of 20310202197 is 79120201302.

It is not a de Polignac number, because 20310202197 - 2²² = 20306007893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20310202197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310202117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41790297 + ... + 41790782.

It is an arithmetic number, because the mean of its divisors is an integer number (2535292760).

Almost surely, 2^20310202197 is an apocalyptic number.

20310202197 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20310202197 is a deficient number, since it is larger than the sum of its proper divisors (10113310923).

20310202197 is an frugal number, since it uses more digits than its factorization.

20310202197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83581094 (or 83581082 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

Adding to 20310202197 its reverse (79120201302), we get a palindrome (99430403499).

The spelling of 20310202197 in words is "twenty billion, three hundred ten million, two hundred two thousand, one hundred ninety-seven".