20873673174749 has 2 divisors, whose sum is σ = 20873673174750. Its totient is φ = 20873673174748.

The previous prime is 20873673174737. The next prime is 20873673174763. The reversal of 20873673174749 is 94747137637802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18282619569124 + 2591053605625 = 4275818^2 + 1609675^2 .

It is a cyclic number.

It is not a de Polignac number, because 20873673174749 - 2¹² = 20873673170653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20873673174349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10436836587374 + 10436836587375.

It is an arithmetic number, because the mean of its divisors is an integer number (10436836587375).

Almost surely, 2^{20873673174749} is an apocalyptic number.

It is an amenable number.

20873673174749 is a deficient number, since it is larger than the sum of its proper divisors (1).

20873673174749 is an equidigital number, since it uses as much as digits as its factorization.

20873673174749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 298722816, while the sum is 68.

The spelling of 20873673174749 in words is "twenty trillion, eight hundred seventy-three billion, six hundred seventy-three million, one hundred seventy-four thousand, seven hundred forty-nine".