21160563006 has 48 divisors (see below), whose sum is σ = 46711670544. Its totient is φ = 6385632000.

The previous prime is 21160562987. The next prime is 21160563019. The reversal of 21160563006 is 60036506112.

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, 114496 + ... + 235436.

It is an arithmetic number, because the mean of its divisors is an integer number (973159803).

Almost surely, 2^21160563006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21160563006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23355835272).

21160563006 is an abundant number, since it is smaller than the sum of its proper divisors (25551107538).

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

21160563006 is a wasteful number, since it uses less digits than its factorization.

21160563006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121209 (or 121198 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 21160563006 in words is "twenty-one billion, one hundred sixty million, five hundred sixty-three thousand, six".