201420618 has 32 divisors (see below), whose sum is σ = 471623040. Its totient is φ = 56144640.

The previous prime is 201420599. The next prime is 201420619. The reversal of 201420618 is 816024102.

It is not an unprimeable number, because it can be changed into a prime (201420619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56763 + ... + 60206.

It is an arithmetic number, because the mean of its divisors is an integer number (14738220).

Almost surely, 2^201420618 is an apocalyptic number.

201420618 is an abundant number, since it is smaller than the sum of its proper divisors (270202422).

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

201420618 is a wasteful number, since it uses less digits than its factorization.

201420618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117022.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 201420618 is about 14192.2731794452. The cubic root of 201420618 is about 586.1849195278.

The spelling of 201420618 in words is "two hundred one million, four hundred twenty thousand, six hundred eighteen".