2521013420 has 24 divisors (see below), whose sum is σ = 5326614384. Its totient is φ = 1002217536.

The previous prime is 2521013399. The next prime is 2521013437. The reversal of 2521013420 is 243101252.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2521013392 and 2521013401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383399 + ... + 389918.

It is an arithmetic number, because the mean of its divisors is an integer number (221942266).

Almost surely, 2^2521013420 is an apocalyptic number.

2521013420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2521013420 is an abundant number, since it is smaller than the sum of its proper divisors (2805600964).

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

2521013420 is a wasteful number, since it uses less digits than its factorization.

2521013420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773489 (or 773487 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2521013420 is about 50209.6944822412. The cubic root of 2521013420 is about 1361.0008168126. Note that the first 3 decimals are identical.

Adding to 2521013420 its reverse (243101252), we get a palindrome (2764114672).

The spelling of 2521013420 in words is "two billion, five hundred twenty-one million, thirteen thousand, four hundred twenty".