201018240 has 128 divisors (see below), whose sum is σ = 712000800. Its totient is φ = 53600256.

The previous prime is 201018197. The next prime is 201018269. The reversal of 201018240 is 42810102.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11464 + ... + 23096.

Almost surely, 2^201018240 is an apocalyptic number.

201018240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201018240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356000400).

201018240 is an abundant number, since it is smaller than the sum of its proper divisors (510982560).

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

201018240 is a wasteful number, since it uses less digits than its factorization.

201018240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11661 (or 11643 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 201018240 is about 14178.0901393664. The cubic root of 201018240 is about 585.7943187427.

Adding to 201018240 its reverse (42810102), we get a palindrome (243828342).

The spelling of 201018240 in words is "two hundred one million, eighteen thousand, two hundred forty".