20145018 has 16 divisors (see below), whose sum is σ = 40517280. Its totient is φ = 6677136.

The previous prime is 20144989. The next prime is 20145029. The reversal of 20145018 is 81054102.

It is a junction number, because it is equal to n+sod(n) for n = 20144985 and 20145003.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8305 + ... + 10452.

It is an arithmetic number, because the mean of its divisors is an integer number (2532330).

Almost surely, 2^20145018 is an apocalyptic number.

20145018 is an abundant number, since it is smaller than the sum of its proper divisors (20372262).

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

20145018 is a wasteful number, since it uses less digits than its factorization.

20145018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18941.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 20145018 is about 4488.3201757450. The cubic root of 20145018 is about 272.0962480173.

The spelling of 20145018 in words is "twenty million, one hundred forty-five thousand, eighteen".