20013124157417 has 2 divisors, whose sum is σ = 20013124157418. Its totient is φ = 20013124157416.

The previous prime is 20013124157401. The next prime is 20013124157513. The reversal of 20013124157417 is 71475142131002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19856390514601 + 156733642816 = 4456051^2 + 395896^2 .

It is a cyclic number.

It is not a de Polignac number, because 20013124157417 - 2⁴ = 20013124157401 is a prime.

It is a super-2 number, since 2×20013124157417² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20013124150417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006562078708 + 10006562078709.

It is an arithmetic number, because the mean of its divisors is an integer number (10006562078709).

Almost surely, 2^{20013124157417} is an apocalyptic number.

It is an amenable number.

20013124157417 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013124157417 is an equidigital number, since it uses as much as digits as its factorization.

20013124157417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 38.

Adding to 20013124157417 its reverse (71475142131002), we get a palindrome (91488266288419).

The spelling of 20013124157417 in words is "twenty trillion, thirteen billion, one hundred twenty-four million, one hundred fifty-seven thousand, four hundred seventeen".