21062867328 has 192 divisors, whose sum is σ = 61493515200. Its totient is φ = 6919471104.

The previous prime is 21062867279. The next prime is 21062867339. The reversal of 21062867328 is 82376826012.

21062867328 is a `hidden beast` number, since 2 + 10 + 628 + 6 + 7 + 3 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31111726 + ... + 31112402.

It is an arithmetic number, because the mean of its divisors is an integer number (320278725).

Almost surely, 2^21062867328 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 21062867328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30746757600).

21062867328 is an abundant number, since it is smaller than the sum of its proper divisors (40430647872).

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

21062867328 is a wasteful number, since it uses less digits than its factorization.

21062867328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 21062867328 in words is "twenty-one billion, sixty-two million, eight hundred sixty-seven thousand, three hundred twenty-eight".