201020510403 has 16 divisors (see below), whose sum is σ = 300081513600. Its totient is φ = 132990666120.

The previous prime is 201020510401. The next prime is 201020510429. The reversal of 201020510403 is 304015020102.

It is not a de Polignac number, because 201020510403 - 2¹ = 201020510401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201020510401) 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, 28413273 + ... + 28420346.

It is an arithmetic number, because the mean of its divisors is an integer number (18755094600).

Almost surely, 2^201020510403 is an apocalyptic number.

201020510403 is a deficient number, since it is larger than the sum of its proper divisors (99061003197).

201020510403 is a wasteful number, since it uses less digits than its factorization.

201020510403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56833759 (or 56833753 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 201020510403 its reverse (304015020102), we get a palindrome (505035530505).

The spelling of 201020510403 in words is "two hundred one billion, twenty million, five hundred ten thousand, four hundred three".