21433511255104 has 112 divisors (see below), whose sum is σ = 48559044865968. Its totient is φ = 9298797723648.

The previous prime is 21433511255059. The next prime is 21433511255113. The reversal of 21433511255104 is 40155211533412.

It can be written as a sum of positive squares in 8 ways, for example, as 947024815104 + 20486486440000 = 973152^2 + 4526200^2 .

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, 10322092 + ... + 12223444.

It is an arithmetic number, because the mean of its divisors is an integer number (433562900589).

Almost surely, 2^{21433511255104} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21433511255104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24279522432984).

21433511255104 is an abundant number, since it is smaller than the sum of its proper divisors (27125533610864).

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

21433511255104 is a wasteful number, since it uses less digits than its factorization.

21433511255104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902192 (or 1902182 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 21433511255104 its reverse (40155211533412), we get a palindrome (61588722788516).

The spelling of 21433511255104 in words is "twenty-one trillion, four hundred thirty-three billion, five hundred eleven million, two hundred fifty-five thousand, one hundred four".