2520605420 has 96 divisors (see below), whose sum is σ = 5651347968. Its totient is φ = 942351872.

The previous prime is 2520605411. The next prime is 2520605491. The reversal of 2520605420 is 245060252.

It is a self number, because there is not a number n which added to its sum of digits gives 2520605420.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 4084952 + ... + 4085568.

It is an arithmetic number, because the mean of its divisors is an integer number (58868208).

Almost surely, 2^2520605420 is an apocalyptic number.

2520605420 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 2520605420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2825673984).

2520605420 is an abundant number, since it is smaller than the sum of its proper divisors (3130742548).

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

2520605420 is a wasteful number, since it uses less digits than its factorization.

2520605420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2520605420 is about 50205.6313574483. The cubic root of 2520605420 is about 1360.9273915401.

Adding to 2520605420 its reverse (245060252), we get a palindrome (2765665672).

The spelling of 2520605420 in words is "two billion, five hundred twenty million, six hundred five thousand, four hundred twenty".