21050869248 has 160 divisors (see below), whose sum is σ = 62933159520. Its totient is φ = 6947020800.

The previous prime is 21050869243. The next prime is 21050869277. The reversal of 21050869248 is 84296805012.

21050869248 is a `hidden beast` number, since 2 + 10 + 508 + 6 + 92 + 48 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21050869243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1388686 + ... + 1403762.

It is an arithmetic number, because the mean of its divisors is an integer number (393332247).

Almost surely, 2^21050869248 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 21050869248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31466579760).

21050869248 is an abundant number, since it is smaller than the sum of its proper divisors (41882290272).

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

21050869248 is a wasteful number, since it uses less digits than its factorization.

21050869248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15205 (or 15183 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 21050869248 in words is "twenty-one billion, fifty million, eight hundred sixty-nine thousand, two hundred forty-eight".