21035350452 has 96 divisors (see below), whose sum is σ = 56469934080. Its totient is φ = 6050280960.

The previous prime is 21035350397. The next prime is 21035350481. The reversal of 21035350452 is 25405353012.

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, 32623 + ... + 207689.

It is an arithmetic number, because the mean of its divisors is an integer number (588228480).

Almost surely, 2^21035350452 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 21035350452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28234967040).

21035350452 is an abundant number, since it is smaller than the sum of its proper divisors (35434583628).

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

21035350452 is a wasteful number, since it uses less digits than its factorization.

21035350452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175141 (or 175139 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The spelling of 21035350452 in words is "twenty-one billion, thirty-five million, three hundred fifty thousand, four hundred fifty-two".