21024524225404 has 192 divisors, whose sum is σ = 45044748951552. Its totient is φ = 8398378598400.

The previous prime is 21024524225371. The next prime is 21024524225407. The reversal of 21024524225404 is 40452242542012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21024524225407) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 496578124 + ... + 496620460.

It is an arithmetic number, because the mean of its divisors is an integer number (234608067456).

Almost surely, 2^{21024524225404} 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 21024524225404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22522374475776).

21024524225404 is an abundant number, since it is smaller than the sum of its proper divisors (24020224726148).

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

21024524225404 is a wasteful number, since it uses less digits than its factorization.

21024524225404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42636 (or 42634 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 37.

Adding to 21024524225404 its reverse (40452242542012), we get a palindrome (61476766767416).

The spelling of 21024524225404 in words is "twenty-one trillion, twenty-four billion, five hundred twenty-four million, two hundred twenty-five thousand, four hundred four".