21426130834375 has 24 divisors (see below), whose sum is σ = 27158146204896. Its totient is φ = 16899483300000.

The previous prime is 21426130834337. The next prime is 21426130834403. The reversal of 21426130834375 is 57343803162412.

It is not a de Polignac number, because 21426130834375 - 2³¹ = 21423983350727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48062364 + ... + 48506113.

It is an arithmetic number, because the mean of its divisors is an integer number (1131589425204).

Almost surely, 2^{21426130834375} is an apocalyptic number.

21426130834375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21426130834375 is a deficient number, since it is larger than the sum of its proper divisors (5732015370521).

21426130834375 is an frugal number, since it uses more digits than its factorization.

21426130834375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96568573 (or 96568553 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 49.

Adding to 21426130834375 its reverse (57343803162412), we get a palindrome (78769933996787).

The spelling of 21426130834375 in words is "twenty-one trillion, four hundred twenty-six billion, one hundred thirty million, eight hundred thirty-four thousand, three hundred seventy-five".