2103557420 has 48 divisors (see below), whose sum is σ = 4526151168. Its totient is φ = 820774080.

The previous prime is 2103557419. The next prime is 2103557447. The reversal of 2103557420 is 247553012.

It is a happy number.

It is a super-3 number, since 3×2103557420³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1057667 + ... + 1059653.

It is an arithmetic number, because the mean of its divisors is an integer number (94294816).

Almost surely, 2^2103557420 is an apocalyptic number.

2103557420 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 2103557420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2263075584).

2103557420 is an abundant number, since it is smaller than the sum of its proper divisors (2422593748).

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

2103557420 is a wasteful number, since it uses less digits than its factorization.

2103557420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3270 (or 3268 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 2103557420 is about 45864.5551597309. Note that the first 3 decimals coincide. The cubic root of 2103557420 is about 1281.3018614899.

The spelling of 2103557420 in words is "two billion, one hundred three million, five hundred fifty-seven thousand, four hundred twenty".