201020540 has 72 divisors (see below), whose sum is σ = 503142192. Its totient is φ = 67226880.

The previous prime is 201020537. The next prime is 201020543. The reversal of 201020540 is 45020102.

It is an interprime number because it is at equal distance from previous prime (201020537) and next prime (201020543).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37679 + ... + 42681.

It is an arithmetic number, because the mean of its divisors is an integer number (6988086).

Almost surely, 2^201020540 is an apocalyptic number.

201020540 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 201020540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251571096).

201020540 is an abundant number, since it is smaller than the sum of its proper divisors (302121652).

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

201020540 is a wasteful number, since it uses less digits than its factorization.

201020540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5067 (or 5058 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 201020540 is about 14178.1712502001. The cubic root of 201020540 is about 585.7965529045.

Adding to 201020540 its reverse (45020102), we get a palindrome (246040642).

The spelling of 201020540 in words is "two hundred one million, twenty thousand, five hundred forty".