21023413421024 has 192 divisors, whose sum is σ = 49754013474816. Its totient is φ = 8549575017984.

The previous prime is 21023413420993. The next prime is 21023413421069. The reversal of 21023413421024 is 42012431432012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 459334589 + ... + 459380355.

It is an arithmetic number, because the mean of its divisors is an integer number (259135486848).

Almost surely, 2^{21023413421024} 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 21023413421024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24877006737408).

21023413421024 is an abundant number, since it is smaller than the sum of its proper divisors (28730600053792).

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

21023413421024 is a wasteful number, since it uses less digits than its factorization.

21023413421024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46517 (or 46509 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21023413421024 its reverse (42012431432012), we get a palindrome (63035844853036).

The spelling of 21023413421024 in words is "twenty-one trillion, twenty-three billion, four hundred thirteen million, four hundred twenty-one thousand, twenty-four".