2520021403 has 8 divisors (see below), whose sum is σ = 2603156480. Its totient is φ = 2437001640.

The previous prime is 2520021397. The next prime is 2520021437. The reversal of 2520021403 is 3041200252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2520021403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2520028403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16768 + ... + 72946.

It is an arithmetic number, because the mean of its divisors is an integer number (325394560).

Almost surely, 2^2520021403 is an apocalyptic number.

2520021403 is a deficient number, since it is larger than the sum of its proper divisors (83135077).

2520021403 is a wasteful number, since it uses less digits than its factorization.

2520021403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57657.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 2520021403 is about 50199.8147705746. The cubic root of 2520021403 is about 1360.8222757719.

Adding to 2520021403 its reverse (3041200252), we get a palindrome (5561221655).

The spelling of 2520021403 in words is "two billion, five hundred twenty million, twenty-one thousand, four hundred three".