20488270217 has 2 divisors, whose sum is σ = 20488270218. Its totient is φ = 20488270216.

The previous prime is 20488270213. The next prime is 20488270333. The reversal of 20488270217 is 71207288402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20136745216 + 351525001 = 141904^2 + 18749^2 .

It is a cyclic number.

It is not a de Polignac number, because 20488270217 - 2² = 20488270213 is a prime.

It is not a weakly prime, because it can be changed into another prime (20488270213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10244135108 + 10244135109.

It is an arithmetic number, because the mean of its divisors is an integer number (10244135109).

Almost surely, 2^20488270217 is an apocalyptic number.

It is an amenable number.

20488270217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20488270217 is an equidigital number, since it uses as much as digits as its factorization.

20488270217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100352, while the sum is 41.

The spelling of 20488270217 in words is "twenty billion, four hundred eighty-eight million, two hundred seventy thousand, two hundred seventeen".