21060787392 has 168 divisors, whose sum is σ = 63060011040. Its totient is φ = 6711828480.

The previous prime is 21060787369. The next prime is 21060787393. The reversal of 21060787392 is 29378706012.

21060787392 is a `hidden beast` number, since 2 + 1 + 0 + 607 + 8 + 7 + 39 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (21060787393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1714392 + ... + 1726632.

Almost surely, 2^21060787392 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 21060787392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31530005520).

21060787392 is an abundant number, since it is smaller than the sum of its proper divisors (41999223648).

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

21060787392 is a wasteful number, since it uses less digits than its factorization.

21060787392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12391 (or 12378 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 21060787392 in words is "twenty-one billion, sixty million, seven hundred eighty-seven thousand, three hundred ninety-two".