21060206880 has 48 divisors (see below), whose sum is σ = 66339653184. Its totient is φ = 5616055040.

The previous prime is 21060206861. The next prime is 21060206929. The reversal of 21060206880 is 8860206012.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21937236 + ... + 21938195.

It is an arithmetic number, because the mean of its divisors is an integer number (1382076108).

Almost surely, 2^21060206880 is an apocalyptic number.

21060206880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21060206880 is an abundant number, since it is smaller than the sum of its proper divisors (45279446304).

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

21060206880 is a wasteful number, since it uses less digits than its factorization.

21060206880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43875449 (or 43875441 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 21060206880 in words is "twenty-one billion, sixty million, two hundred six thousand, eight hundred eighty".