20449102397767 has 2 divisors, whose sum is σ = 20449102397768. Its totient is φ = 20449102397766.

The previous prime is 20449102397753. The next prime is 20449102397821. The reversal of 20449102397767 is 76779320194402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20449102397767 - 2²³ = 20449094009159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20449102397467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10224551198883 + 10224551198884.

It is an arithmetic number, because the mean of its divisors is an integer number (10224551198884).

Almost surely, 2^{20449102397767} is an apocalyptic number.

20449102397767 is a deficient number, since it is larger than the sum of its proper divisors (1).

20449102397767 is an equidigital number, since it uses as much as digits as its factorization.

20449102397767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32006016, while the sum is 61.

The spelling of 20449102397767 in words is "twenty trillion, four hundred forty-nine billion, one hundred two million, three hundred ninety-seven thousand, seven hundred sixty-seven".