18602020 has 12 divisors (see below), whose sum is σ = 39064284. Its totient is φ = 7440800.

The previous prime is 18601967. The next prime is 18602027. The reversal of 18602020 is 2020681.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3810304 + 14791716 = 1952^2 + 3846^2 .

18602020 is a modest number, since divided by 2020 gives 1860 as remainder.

It is not an unprimeable number, because it can be changed into a prime (18602027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465031 + ... + 465070.

It is an arithmetic number, because the mean of its divisors is an integer number (3255357).

Almost surely, 2^18602020 is an apocalyptic number.

18602020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18602020 is an abundant number, since it is smaller than the sum of its proper divisors (20462264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18602020 is a wasteful number, since it uses less digits than its factorization.

18602020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930110 (or 930108 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 18602020 is about 4313.0059123539. The cubic root of 18602020 is about 264.9638968260.

The spelling of 18602020 in words is "eighteen million, six hundred two thousand, twenty".