1820219057 has 16 divisors (see below), whose sum is σ = 2001360000. Its totient is φ = 1647765504.

The previous prime is 1820219021. The next prime is 1820219059. The reversal of 1820219057 is 7509120281.

It is a cyclic number.

It is not a de Polignac number, because 1820219057 - 2¹⁴ = 1820202673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1820219059) 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, 675569 + ... + 678257.

It is an arithmetic number, because the mean of its divisors is an integer number (125085000).

Almost surely, 2^1820219057 is an apocalyptic number.

It is an amenable number.

1820219057 is a deficient number, since it is larger than the sum of its proper divisors (181140943).

1820219057 is a wasteful number, since it uses less digits than its factorization.

1820219057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 1820219057 is about 42664.0253257941. The cubic root of 1820219057 is about 1220.9781318617.

The spelling of 1820219057 in words is "one billion, eight hundred twenty million, two hundred nineteen thousand, fifty-seven".