18282020 has 24 divisors (see below), whose sum is σ = 38755584. Its totient is φ = 7243616.

The previous prime is 18282007. The next prime is 18282029. The reversal of 18282020 is 2028281.

It is not an unprimeable number, because it can be changed into a prime (18282029) 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, 2132 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (1614816).

Almost surely, 2^18282020 is an apocalyptic number.

18282020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18282020 is an abundant number, since it is smaller than the sum of its proper divisors (20473564).

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

18282020 is a wasteful number, since it uses less digits than its factorization.

18282020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8659 (or 8657 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 18282020 is about 4275.7478877969. The cubic root of 18282020 is about 263.4357592616.

The spelling of 18282020 in words is "eighteen million, two hundred eighty-two thousand, twenty".