21047568030 has 96 divisors (see below), whose sum is σ = 56445989184. Its totient is φ = 5437352448.

The previous prime is 21047568023. The next prime is 21047568037. The reversal of 21047568030 is 3086574012.

21047568030 is a `hidden beast` number, since 21 + 0 + 47 + 568 + 0 + 30 = 666.

It is an interprime number because it is at equal distance from previous prime (21047568023) and next prime (21047568037).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21047568037) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 762327 + ... + 789453.

It is an arithmetic number, because the mean of its divisors is an integer number (587979054).

Almost surely, 2^21047568030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21047568030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28222994592).

21047568030 is an abundant number, since it is smaller than the sum of its proper divisors (35398421154).

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

21047568030 is a wasteful number, since it uses less digits than its factorization.

21047568030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27410 (or 27407 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 21047568030 in words is "twenty-one billion, forty-seven million, five hundred sixty-eight thousand, thirty".