2101342520 has 32 divisors (see below), whose sum is σ = 4737694320. Its totient is φ = 838817280.

The previous prime is 2101342513. The next prime is 2101342531. The reversal of 2101342520 is 252431012.

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 = 2101342492 and 2101342501.

It is a congruent number.

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, 33857 + ... + 73136.

Almost surely, 2^2101342520 is an apocalyptic number.

2101342520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101342520 is an abundant number, since it is smaller than the sum of its proper divisors (2636351800).

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

2101342520 is a wasteful number, since it uses less digits than its factorization.

2101342520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107495 (or 107491 counting only the distinct ones).

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

The square root of 2101342520 is about 45840.4027032922. The cubic root of 2101342520 is about 1280.8519962432.

Adding to 2101342520 its reverse (252431012), we get a palindrome (2353773532).

The spelling of 2101342520 in words is "two billion, one hundred one million, three hundred forty-two thousand, five hundred twenty".