2021403105 has 24 divisors (see below), whose sum is σ = 3709870632. Its totient is φ = 1014664704.

The previous prime is 2021403073. The next prime is 2021403107. The reversal of 2021403105 is 5013041202.

2021403105 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 36433296 + 1984969809 = 6036^2 + 44553^2 .

It is not a de Polignac number, because 2021403105 - 2⁵ = 2021403073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021403107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1320414 + ... + 1321943.

It is an arithmetic number, because the mean of its divisors is an integer number (154577943).

Almost surely, 2^2021403105 is an apocalyptic number.

It is an amenable number.

2021403105 is a deficient number, since it is larger than the sum of its proper divisors (1688467527).

2021403105 is a wasteful number, since it uses less digits than its factorization.

2021403105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642385 (or 2642382 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2021403105 is about 44960.0167370965. The cubic root of 2021403105 is about 1264.3994827102.

Adding to 2021403105 its reverse (5013041202), we get a palindrome (7034444307).

The spelling of 2021403105 in words is "two billion, twenty-one million, four hundred three thousand, one hundred five".