1820263049 has 16 divisors (see below), whose sum is σ = 2121863040. Its totient is φ = 1543138560.

The previous prime is 1820263031. The next prime is 1820263051. The reversal of 1820263049 is 9403620281.

It is a cyclic number.

It is not a de Polignac number, because 1820263049 - 2¹² = 1820258953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1820263009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24269 + ... + 65034.

It is an arithmetic number, because the mean of its divisors is an integer number (132616440).

Almost surely, 2^1820263049 is an apocalyptic number.

It is an amenable number.

1820263049 is a deficient number, since it is larger than the sum of its proper divisors (301599991).

1820263049 is a wasteful number, since it uses less digits than its factorization.

1820263049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89440.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1820263049 is about 42664.5408858457. The cubic root of 1820263049 is about 1220.9879681937.

The spelling of 1820263049 in words is "one billion, eight hundred twenty million, two hundred sixty-three thousand, forty-nine".