21042450423334 has 32 divisors (see below), whose sum is σ = 32477499535104. Its totient is φ = 10220584065120.

The previous prime is 21042450423329. The next prime is 21042450423349. The reversal of 21042450423334 is 43332405424012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21042450423293 and 21042450423302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59249629 + ... + 59603719.

It is an arithmetic number, because the mean of its divisors is an integer number (1014921860472).

Almost surely, 2^{21042450423334} is an apocalyptic number.

21042450423334 is a deficient number, since it is larger than the sum of its proper divisors (11435049111770).

21042450423334 is a wasteful number, since it uses less digits than its factorization.

21042450423334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359692.

The product of its (nonzero) digits is 276480, while the sum is 37.

Adding to 21042450423334 its reverse (43332405424012), we get a palindrome (64374855847346).

The spelling of 21042450423334 in words is "twenty-one trillion, forty-two billion, four hundred fifty million, four hundred twenty-three thousand, three hundred thirty-four".