2105044400 has 30 divisors (see below), whose sum is σ = 5057370132. Its totient is φ = 842017600.

The previous prime is 2105044393. The next prime is 2105044411. The reversal of 2105044400 is 44405012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2630906 + ... + 2631705.

Almost surely, 2^2105044400 is an apocalyptic number.

2105044400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105044400 is an abundant number, since it is smaller than the sum of its proper divisors (2952325732).

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

2105044400 is a wasteful number, since it uses less digits than its factorization.

2105044400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5262629 (or 5262618 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 2105044400 is about 45880.7628532918. The cubic root of 2105044400 is about 1281.6037027838.

Adding to 2105044400 its reverse (44405012), we get a palindrome (2149449412).

The spelling of 2105044400 in words is "two billion, one hundred five million, forty-four thousand, four hundred".