1820057071 has 8 divisors (see below), whose sum is σ = 2100260864. Its totient is φ = 1544902200.

The previous prime is 1820057059. The next prime is 1820057147. The reversal of 1820057071 is 1707500281.

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 1820057071 - 2²⁷ = 1685839343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820057021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1261455 + ... + 1262896.

It is an arithmetic number, because the mean of its divisors is an integer number (262532608).

Almost surely, 2^1820057071 is an apocalyptic number.

1820057071 is a deficient number, since it is larger than the sum of its proper divisors (280203793).

1820057071 is a wasteful number, since it uses less digits than its factorization.

1820057071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524461.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 1820057071 is about 42662.1268925964. The cubic root of 1820057071 is about 1220.9419114536.

The spelling of 1820057071 in words is "one billion, eight hundred twenty million, fifty-seven thousand, seventy-one".