20180458880977 has 2 divisors, whose sum is σ = 20180458880978. Its totient is φ = 20180458880976.

The previous prime is 20180458880951. The next prime is 20180458881013. The reversal of 20180458880977 is 77908885408102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14409130116096 + 5771328764881 = 3795936^2 + 2402359^2 .

It is a cyclic number.

It is not a de Polignac number, because 20180458880977 - 2¹¹ = 20180458878929 is a prime.

It is not a weakly prime, because it can be changed into another prime (20180458860977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10090229440488 + 10090229440489.

It is an arithmetic number, because the mean of its divisors is an integer number (10090229440489).

Almost surely, 2^{20180458880977} is an apocalyptic number.

It is an amenable number.

20180458880977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20180458880977 is an equidigital number, since it uses as much as digits as its factorization.

20180458880977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72253440, while the sum is 67.

The spelling of 20180458880977 in words is "twenty trillion, one hundred eighty billion, four hundred fifty-eight million, eight hundred eighty thousand, nine hundred seventy-seven".