21130108320 has 48 divisors (see below), whose sum is σ = 66559842720. Its totient is φ = 5634695424.

The previous prime is 21130108313. The next prime is 21130108339. The reversal of 21130108320 is 2380103112.

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

It is a super-2 number, since 2×21130108320² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22010050 + ... + 22011009.

It is an arithmetic number, because the mean of its divisors is an integer number (1386663390).

Almost surely, 2^21130108320 is an apocalyptic number.

21130108320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21130108320 is an abundant number, since it is smaller than the sum of its proper divisors (45429734400).

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

21130108320 is a wasteful number, since it uses less digits than its factorization.

21130108320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44021077 (or 44021069 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 21130108320 in words is "twenty-one billion, one hundred thirty million, one hundred eight thousand, three hundred twenty".