2100355420 has 24 divisors (see below), whose sum is σ = 4438846944. Its totient is φ = 834789696.

The previous prime is 2100355417. The next prime is 2100355427. The reversal of 2100355420 is 245530012.

It is a super-2 number, since 2×2100355420² = 8822985780646752800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2100355391 and 2100355400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100355427) 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, 331312 + ... + 337591.

It is an arithmetic number, because the mean of its divisors is an integer number (184951956).

Almost surely, 2^2100355420 is an apocalyptic number.

2100355420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100355420 is an abundant number, since it is smaller than the sum of its proper divisors (2338491524).

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

2100355420 is a wasteful number, since it uses less digits than its factorization.

2100355420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669069 (or 669067 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 2100355420 is about 45829.6347356162. The cubic root of 2100355420 is about 1280.6514059037.

Adding to 2100355420 its reverse (245530012), we get a palindrome (2345885432).

The spelling of 2100355420 in words is "two billion, one hundred million, three hundred fifty-five thousand, four hundred twenty".