2105555420 has 48 divisors (see below), whose sum is σ = 4505608800. Its totient is φ = 826291200.

The previous prime is 2105555407. The next prime is 2105555437. The reversal of 2105555420 is 245555012.

It is a congruent number.

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, 707696 + ... + 710664.

It is an arithmetic number, because the mean of its divisors is an integer number (93866850).

Almost surely, 2^2105555420 is an apocalyptic number.

2105555420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105555420 is an abundant number, since it is smaller than the sum of its proper divisors (2400053380).

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

2105555420 is a wasteful number, since it uses less digits than its factorization.

2105555420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3638 (or 3636 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 2105555420 is about 45886.3315160408. The cubic root of 2105555420 is about 1281.7074016472.

The spelling of 2105555420 in words is "two billion, one hundred five million, five hundred fifty-five thousand, four hundred twenty".