21230245134 has 24 divisors (see below), whose sum is σ = 52570131120. Its totient is φ = 6065784288.

The previous prime is 21230245129. The next prime is 21230245159. The reversal of 21230245134 is 43154203212.

21230245134 is a `hidden beast` number, since 2 + 123 + 0 + 24 + 513 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21230245098 and 21230245107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84246879 + ... + 84247130.

It is an arithmetic number, because the mean of its divisors is an integer number (2190422130).

Almost surely, 2^21230245134 is an apocalyptic number.

21230245134 is an abundant number, since it is smaller than the sum of its proper divisors (31339885986).

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

21230245134 is a wasteful number, since it uses less digits than its factorization.

21230245134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168494024 (or 168494021 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 21230245134 its reverse (43154203212), we get a palindrome (64384448346).

The spelling of 21230245134 in words is "twenty-one billion, two hundred thirty million, two hundred forty-five thousand, one hundred thirty-four".