21301105392 has 480 divisors, whose sum is σ = 73211314176. Its totient is φ = 5653670400.

The previous prime is 21301105381. The next prime is 21301105459. The reversal of 21301105392 is 29350110312.

21301105392 is a `hidden beast` number, since 2 + 13 + 0 + 110 + 539 + 2 = 666.

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 95 ways as a sum of consecutive naturals, for example, 111524017 + ... + 111524207.

Almost surely, 2^21301105392 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 21301105392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36605657088).

21301105392 is an abundant number, since it is smaller than the sum of its proper divisors (51910208784).

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

21301105392 is a wasteful number, since it uses less digits than its factorization.

21301105392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The spelling of 21301105392 in words is "twenty-one billion, three hundred one million, one hundred five thousand, three hundred ninety-two".