18820057 has 8 divisors (see below), whose sum is σ = 19270784. Its totient is φ = 18374688.

The previous prime is 18820031. The next prime is 18820063. The reversal of 18820057 is 75002881.

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 18820057 - 2¹⁵ = 18787289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18820097) 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, 6268 + ... + 8770.

It is an arithmetic number, because the mean of its divisors is an integer number (2408848).

Almost surely, 2^18820057 is an apocalyptic number.

It is an amenable number.

18820057 is a deficient number, since it is larger than the sum of its proper divisors (450727).

18820057 is a wasteful number, since it uses less digits than its factorization.

18820057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 18820057 is about 4338.2089622331. The cubic root of 18820057 is about 265.9951051542.

The spelling of 18820057 in words is "eighteen million, eight hundred twenty thousand, fifty-seven".