21023534244234 has 32 divisors (see below), whose sum is σ = 42065759713536. Its totient is φ = 7004729926080.

The previous prime is 21023534244227. The next prime is 21023534244283. The reversal of 21023534244234 is 43244243532012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21023534244192 and 21023534244201.

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, 278268504 + ... + 278344044.

It is an arithmetic number, because the mean of its divisors is an integer number (1314554991048).

Almost surely, 2^{21023534244234} is an apocalyptic number.

21023534244234 is an abundant number, since it is smaller than the sum of its proper divisors (21042225469302).

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

21023534244234 is a wasteful number, since it uses less digits than its factorization.

21023534244234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95550.

The product of its (nonzero) digits is 552960, while the sum is 39.

Adding to 21023534244234 its reverse (43244243532012), we get a palindrome (64267777776246).

The spelling of 21023534244234 in words is "twenty-one trillion, twenty-three billion, five hundred thirty-four million, two hundred forty-four thousand, two hundred thirty-four".