21030404353 has 64 divisors (see below), whose sum is σ = 28359936000. Its totient is φ = 15155610624.

The previous prime is 21030404341. The next prime is 21030404357. The reversal of 21030404353 is 35340403012.

It is not a de Polignac number, because 21030404353 - 2⁵ = 21030404321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21030404357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2815738 + ... + 2823196.

It is an arithmetic number, because the mean of its divisors is an integer number (443124000).

Almost surely, 2^21030404353 is an apocalyptic number.

It is an amenable number.

21030404353 is a deficient number, since it is larger than the sum of its proper divisors (7329531647).

21030404353 is a wasteful number, since it uses less digits than its factorization.

21030404353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7574.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 21030404353 its reverse (35340403012), we get a palindrome (56370807365).

The spelling of 21030404353 in words is "twenty-one billion, thirty million, four hundred four thousand, three hundred fifty-three".