420000018 has 16 divisors (see below), whose sum is σ = 841954176. Its totient is φ = 139674320.

The previous prime is 419999947. The next prime is 420000029. The reversal of 420000018 is 810000024.

It is a junction number, because it is equal to n+sod(n) for n = 419999961 and 420000006.

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, 78621 + ... + 83792.

It is an arithmetic number, because the mean of its divisors is an integer number (52622136).

Almost surely, 2^420000018 is an apocalyptic number.

420000018 is an abundant number, since it is smaller than the sum of its proper divisors (421954158).

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

420000018 is a wasteful number, since it uses less digits than its factorization.

420000018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162849.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 420000018 is about 20493.9019710742. The cubic root of 420000018 is about 748.8872494202.

The spelling of 420000018 in words is "four hundred twenty million, eighteen", and thus it is an aban number.