2021604247 has 8 divisors (see below), whose sum is σ = 2177688240. Its totient is φ = 1865602560.

The previous prime is 2021604227. The next prime is 2021604259. The reversal of 2021604247 is 7424061202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021604247 - 2¹⁹ = 2021079959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021604227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36279 + ... + 73207.

It is an arithmetic number, because the mean of its divisors is an integer number (272211030).

Almost surely, 2^2021604247 is an apocalyptic number.

2021604247 is a deficient number, since it is larger than the sum of its proper divisors (156083993).

2021604247 is a wasteful number, since it uses less digits than its factorization.

2021604247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41153.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 2021604247 is about 44962.2535800865. The cubic root of 2021604247 is about 1264.4414198190.

Adding to 2021604247 its reverse (7424061202), we get a palindrome (9445665449).

The spelling of 2021604247 in words is "two billion, twenty-one million, six hundred four thousand, two hundred forty-seven".