21134230134424 has 32 divisors (see below), whose sum is σ = 43749939723840. Its totient is φ = 9490727658400.

The previous prime is 21134230134397. The next prime is 21134230134497. The reversal of 21134230134424 is 42443103243112.

It is a self number, because there is not a number n which added to its sum of digits gives 21134230134424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1446749962 + ... + 1446764569.

It is an arithmetic number, because the mean of its divisors is an integer number (1367185616370).

Almost surely, 2^{21134230134424} is an apocalyptic number.

It is an amenable number.

21134230134424 is an abundant number, since it is smaller than the sum of its proper divisors (22615709589416).

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

21134230134424 is a wasteful number, since it uses less digits than its factorization.

21134230134424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2893514631 (or 2893514627 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 21134230134424 its reverse (42443103243112), we get a palindrome (63577333377536).

The spelling of 21134230134424 in words is "twenty-one trillion, one hundred thirty-four billion, two hundred thirty million, one hundred thirty-four thousand, four hundred twenty-four".