20015015417 has 2 divisors, whose sum is σ = 20015015418. Its totient is φ = 20015015416.

The previous prime is 20015015413. The next prime is 20015015441. The reversal of 20015015417 is 71451051002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17789157376 + 2225858041 = 133376^2 + 47179^2 .

It is a cyclic number.

It is not a de Polignac number, because 20015015417 - 2² = 20015015413 is a prime.

It is a super-3 number, since 3×20015015417³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20015015413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007507708 + 10007507709.

It is an arithmetic number, because the mean of its divisors is an integer number (10007507709).

Almost surely, 2^20015015417 is an apocalyptic number.

It is an amenable number.

20015015417 is a deficient number, since it is larger than the sum of its proper divisors (1).

20015015417 is an equidigital number, since it uses as much as digits as its factorization.

20015015417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 26.

Adding to 20015015417 its reverse (71451051002), we get a palindrome (91466066419).

The spelling of 20015015417 in words is "twenty billion, fifteen million, fifteen thousand, four hundred seventeen".