20372271097 has 2 divisors, whose sum is σ = 20372271098. Its totient is φ = 20372271096.

The previous prime is 20372271047. The next prime is 20372271107. The reversal of 20372271097 is 79017227302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16318529536 + 4053741561 = 127744^2 + 63669^2 .

It is a cyclic number.

It is not a de Polignac number, because 20372271097 - 2¹⁵ = 20372238329 is a prime.

It is not a weakly prime, because it can be changed into another prime (20372271047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186135548 + 10186135549.

It is an arithmetic number, because the mean of its divisors is an integer number (10186135549).

Almost surely, 2^20372271097 is an apocalyptic number.

It is an amenable number.

20372271097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20372271097 is an equidigital number, since it uses as much as digits as its factorization.

20372271097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74088, while the sum is 40.

Adding to 20372271097 its reverse (79017227302), we get a palindrome (99389498399).

The spelling of 20372271097 in words is "twenty billion, three hundred seventy-two million, two hundred seventy-one thousand, ninety-seven".