2521319820 has 24 divisors (see below), whose sum is σ = 7059695664. Its totient is φ = 672351936.

The previous prime is 2521319809. The next prime is 2521319821. The reversal of 2521319820 is 289131252.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2521319821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21010939 + ... + 21011058.

It is an arithmetic number, because the mean of its divisors is an integer number (294153986).

Almost surely, 2^2521319820 is an apocalyptic number.

2521319820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2521319820 is an abundant number, since it is smaller than the sum of its proper divisors (4538375844).

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

2521319820 is a wasteful number, since it uses less digits than its factorization.

2521319820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42022009 (or 42022007 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 2521319820 is about 50212.7455931261. The cubic root of 2521319820 is about 1361.0559525441.

The spelling of 2521319820 in words is "two billion, five hundred twenty-one million, three hundred nineteen thousand, eight hundred twenty".