21452105024 has 84 divisors (see below), whose sum is σ = 49391901216. Its totient is φ = 9055689984.

The previous prime is 21452104969. The next prime is 21452105057. The reversal of 21452105024 is 42050125412.

It is a junction number, because it is equal to n+sod(n) for n = 21452104984 and 21452105002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2005739 + ... + 2016405.

It is an arithmetic number, because the mean of its divisors is an integer number (587998824).

Almost surely, 2^21452105024 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 21452105024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24695950608).

21452105024 is an abundant number, since it is smaller than the sum of its proper divisors (27939796192).

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

21452105024 is an equidigital number, since it uses as much as digits as its factorization.

21452105024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10820 (or 10743 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 21452105024 in words is "twenty-one billion, four hundred fifty-two million, one hundred five thousand, twenty-four".