21130424355 has 16 divisors (see below), whose sum is σ = 33852661920. Its totient is φ = 11254898688.

The previous prime is 21130424317. The next prime is 21130424389. The reversal of 21130424355 is 55342403112.

It is not a de Polignac number, because 21130424355 - 2⁸ = 21130424099 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 904392 + ... + 927461.

It is an arithmetic number, because the mean of its divisors is an integer number (2115791370).

Almost surely, 2^21130424355 is an apocalyptic number.

21130424355 is a deficient number, since it is larger than the sum of its proper divisors (12722237565).

21130424355 is a wasteful number, since it uses less digits than its factorization.

21130424355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832630.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21130424355 its reverse (55342403112), we get a palindrome (76472827467).

The spelling of 21130424355 in words is "twenty-one billion, one hundred thirty million, four hundred twenty-four thousand, three hundred fifty-five".