204021024149 has 2 divisors, whose sum is σ = 204021024150. Its totient is φ = 204021024148.

The previous prime is 204021024071. The next prime is 204021024173. The reversal of 204021024149 is 941420120402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130678635025 + 73342389124 = 361495^2 + 270818^2 .

It is a cyclic number.

It is not a de Polignac number, because 204021024149 - 2³² = 199726056853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204021524149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102010512074 + 102010512075.

It is an arithmetic number, because the mean of its divisors is an integer number (102010512075).

Almost surely, 2^204021024149 is an apocalyptic number.

It is an amenable number.

204021024149 is a deficient number, since it is larger than the sum of its proper divisors (1).

204021024149 is an equidigital number, since it uses as much as digits as its factorization.

204021024149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 204021024149 in words is "two hundred four billion, twenty-one million, twenty-four thousand, one hundred forty-nine".