2103545000 has 80 divisors (see below), whose sum is σ = 4950805860. Its totient is φ = 837632000.

The previous prime is 2103544999. The next prime is 2103545009. The reversal of 2103545000 is 5453012.

It can be written as a sum of positive squares in 10 ways, for example, as 137686756 + 1965858244 = 11734^2 + 44338^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2103545009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1284182 + ... + 1285818.

Almost surely, 2^2103545000 is an apocalyptic number.

2103545000 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 2103545000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2475402930).

2103545000 is an abundant number, since it is smaller than the sum of its proper divisors (2847260860).

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

2103545000 is a wasteful number, since it uses less digits than its factorization.

2103545000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920 (or 1901 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2103545000 is about 45864.4197608560. The cubic root of 2103545000 is about 1281.2993397617.

Adding to 2103545000 its reverse (5453012), we get a palindrome (2108998012).

The spelling of 2103545000 in words is "two billion, one hundred three million, five hundred forty-five thousand".