20163731023451 has 2 divisors, whose sum is σ = 20163731023452. Its totient is φ = 20163731023450.

The previous prime is 20163731023421. The next prime is 20163731023459. The reversal of 20163731023451 is 15432013736102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20163731023451 - 2³⁸ = 19888853116507 is a prime.

It is not a weakly prime, because it can be changed into another prime (20163731023459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10081865511725 + 10081865511726.

It is an arithmetic number, because the mean of its divisors is an integer number (10081865511726).

Almost surely, 2^{20163731023451} is an apocalyptic number.

20163731023451 is a deficient number, since it is larger than the sum of its proper divisors (1).

20163731023451 is an equidigital number, since it uses as much as digits as its factorization.

20163731023451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

Adding to 20163731023451 its reverse (15432013736102), we get a palindrome (35595744759553).

The spelling of 20163731023451 in words is "twenty trillion, one hundred sixty-three billion, seven hundred thirty-one million, twenty-three thousand, four hundred fifty-one".