204920290884137 has 2 divisors, whose sum is σ = 204920290884138. Its totient is φ = 204920290884136.

The previous prime is 204920290884041. The next prime is 204920290884173. The reversal of 204920290884137 is 731488092029402.

Together with next prime (204920290884173) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108619355487721 + 96300935396416 = 10422061^2 + 9813304^2 .

It is a cyclic number.

It is not a de Polignac number, because 204920290884137 - 2⁸ = 204920290883881 is a prime.

It is a super-2 number, since 2×204920290884137² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204920290883137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102460145442068 + 102460145442069.

It is an arithmetic number, because the mean of its divisors is an integer number (102460145442069).

Almost surely, 2^{204920290884137} is an apocalyptic number.

It is an amenable number.

204920290884137 is a deficient number, since it is larger than the sum of its proper divisors (1).

204920290884137 is an equidigital number, since it uses as much as digits as its factorization.

204920290884137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13934592, while the sum is 59.

The spelling of 204920290884137 in words is "two hundred four trillion, nine hundred twenty billion, two hundred ninety million, eight hundred eighty-four thousand, one hundred thirty-seven".