18810103057 has 4 divisors (see below), whose sum is σ = 18976564260. Its totient is φ = 18643641856.

The previous prime is 18810103049. The next prime is 18810103061. The reversal of 18810103057 is 75030101881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7184088081 + 11626014976 = 84759^2 + 107824^2 .

It is a cyclic number.

It is not a de Polignac number, because 18810103057 - 2³ = 18810103049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18810103007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83230432 + ... + 83230657.

It is an arithmetic number, because the mean of its divisors is an integer number (4744141065).

Almost surely, 2^18810103057 is an apocalyptic number.

It is an amenable number.

18810103057 is a deficient number, since it is larger than the sum of its proper divisors (166461203).

18810103057 is a wasteful number, since it uses less digits than its factorization.

18810103057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166461202.

The product of its (nonzero) digits is 6720, while the sum is 34.

The spelling of 18810103057 in words is "eighteen billion, eight hundred ten million, one hundred three thousand, fifty-seven".