21134230134423 has 16 divisors (see below), whose sum is σ = 32211432926976. Its totient is φ = 12074118520320.

The previous prime is 21134230134397. The next prime is 21134230134497. The reversal of 21134230134423 is 32443103243112.

It is not a de Polignac number, because 21134230134423 - 2²⁴ = 21134213357207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134230134023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107583433 + ... + 107779698.

It is an arithmetic number, because the mean of its divisors is an integer number (2013214557936).

Almost surely, 2^{21134230134423} is an apocalyptic number.

21134230134423 is a deficient number, since it is larger than the sum of its proper divisors (11077202792553).

21134230134423 is a wasteful number, since it uses less digits than its factorization.

21134230134423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215367814.

The product of its (nonzero) digits is 41472, while the sum is 33.

Adding to 21134230134423 its reverse (32443103243112), we get a palindrome (53577333377535).

The spelling of 21134230134423 in words is "twenty-one trillion, one hundred thirty-four billion, two hundred thirty million, one hundred thirty-four thousand, four hundred twenty-three".