20373496717481 has 2 divisors, whose sum is σ = 20373496717482. Its totient is φ = 20373496717480.

The previous prime is 20373496717463. The next prime is 20373496717513. The reversal of 20373496717481 is 18471769437302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19575138384400 + 798358333081 = 4424380^2 + 893509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20373496717481 is a prime.

It is a super-2 number, since 2×20373496717481² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20373496717181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186748358740 + 10186748358741.

It is an arithmetic number, because the mean of its divisors is an integer number (10186748358741).

Almost surely, 2^{20373496717481} is an apocalyptic number.

It is an amenable number.

20373496717481 is a deficient number, since it is larger than the sum of its proper divisors (1).

20373496717481 is an equidigital number, since it uses as much as digits as its factorization.

20373496717481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42674688, while the sum is 62.

The spelling of 20373496717481 in words is "twenty trillion, three hundred seventy-three billion, four hundred ninety-six million, seven hundred seventeen thousand, four hundred eighty-one".