2021604259 has 2 divisors, whose sum is σ = 2021604260. Its totient is φ = 2021604258.

The previous prime is 2021604227. The next prime is 2021604289. The reversal of 2021604259 is 9524061202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021604259 - 2⁵ = 2021604227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021604259.

It is not a weakly prime, because it can be changed into another prime (2021604289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010802129 + 1010802130.

It is an arithmetic number, because the mean of its divisors is an integer number (1010802130).

Almost surely, 2^2021604259 is an apocalyptic number.

2021604259 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021604259 is an equidigital number, since it uses as much as digits as its factorization.

2021604259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2021604259 is about 44962.2537135318. The cubic root of 2021604259 is about 1264.4414223208.

The spelling of 2021604259 in words is "two billion, twenty-one million, six hundred four thousand, two hundred fifty-nine".