200020001999977 has 2 divisors, whose sum is σ = 200020001999978. Its totient is φ = 200020001999976.

The previous prime is 200020001999971. The next prime is 200020001999989. The reversal of 200020001999977 is 779999100020002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172047792656601 + 27972209343376 = 13116699^2 + 5288876^2 .

It is a cyclic number.

It is not a de Polignac number, because 200020001999977 - 2¹⁵ = 200020001967209 is a prime.

It is not a weakly prime, because it can be changed into another prime (200020001999971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010000999988 + 100010000999989.

It is an arithmetic number, because the mean of its divisors is an integer number (100010000999989).

Almost surely, 2^{200020001999977} is an apocalyptic number.

It is an amenable number.

200020001999977 is a deficient number, since it is larger than the sum of its proper divisors (1).

200020001999977 is an equidigital number, since it uses as much as digits as its factorization.

200020001999977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1285956, while the sum is 55.

The spelling of 200020001999977 in words is "two hundred trillion, twenty billion, one million, nine hundred ninety-nine thousand, nine hundred seventy-seven".