18552782020 has 12 divisors (see below), whose sum is σ = 38960842284. Its totient is φ = 7421112800.

The previous prime is 18552781999. The next prime is 18552782041. The reversal of 18552782020 is 2028725581.

It is an interprime number because it is at equal distance from previous prime (18552781999) and next prime (18552782041).

It can be written as a sum of positive squares in 2 ways, for example, as 11453708484 + 7099073536 = 107022^2 + 84256^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463819531 + ... + 463819570.

It is an arithmetic number, because the mean of its divisors is an integer number (3246736857).

Almost surely, 2^18552782020 is an apocalyptic number.

18552782020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18552782020 is an abundant number, since it is smaller than the sum of its proper divisors (20408060264).

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

18552782020 is a wasteful number, since it uses less digits than its factorization.

18552782020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927639110 (or 927639108 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 40.

The spelling of 18552782020 in words is "eighteen billion, five hundred fifty-two million, seven hundred eighty-two thousand, twenty".