20507463124381 has 2 divisors, whose sum is σ = 20507463124382. Its totient is φ = 20507463124380.

The previous prime is 20507463124367. The next prime is 20507463124429. The reversal of 20507463124381 is 18342136470502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13019901056100 + 7487562068281 = 3608310^2 + 2736341^2 .

It is a cyclic number.

It is not a de Polignac number, because 20507463124381 - 2⁵ = 20507463124349 is a prime.

It is a super-2 number, since 2×20507463124381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20507463121381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10253731562190 + 10253731562191.

It is an arithmetic number, because the mean of its divisors is an integer number (10253731562191).

Almost surely, 2^{20507463124381} is an apocalyptic number.

It is an amenable number.

20507463124381 is a deficient number, since it is larger than the sum of its proper divisors (1).

20507463124381 is an equidigital number, since it uses as much as digits as its factorization.

20507463124381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 46.

Adding to 20507463124381 its reverse (18342136470502), we get a palindrome (38849599594883).

The spelling of 20507463124381 in words is "twenty trillion, five hundred seven billion, four hundred sixty-three million, one hundred twenty-four thousand, three hundred eighty-one".