21234034142044 has 24 divisors (see below), whose sum is σ = 37857884338400. Its totient is φ = 10418957455104.

The previous prime is 21234034141987. The next prime is 21234034142047. The reversal of 21234034142044 is 44024143043212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234034142047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182653689 + ... + 182769904.

Almost surely, 2^{21234034142044} is an apocalyptic number.

It is an amenable number.

21234034142044 is a deficient number, since it is larger than the sum of its proper divisors (16623850196356).

21234034142044 is a wasteful number, since it uses less digits than its factorization.

21234034142044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365423869 (or 365423867 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 21234034142044 its reverse (44024143043212), we get a palindrome (65258177185256).

The spelling of 21234034142044 in words is "twenty-one trillion, two hundred thirty-four billion, thirty-four million, one hundred forty-two thousand, forty-four".