21628481160 has 128 divisors (see below), whose sum is σ = 76229112960. Its totient is φ = 4839936000.

The previous prime is 21628481141. The next prime is 21628481177. The reversal of 21628481160 is 6118482612.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 31 ways as a sum of consecutive naturals, for example, 613041 + ... + 647360.

It is an arithmetic number, because the mean of its divisors is an integer number (595539945).

Almost surely, 2^21628481160 is an apocalyptic number.

21628481160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21628481160 is an abundant number, since it is smaller than the sum of its proper divisors (54600631800).

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

21628481160 is a wasteful number, since it uses less digits than its factorization.

21628481160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260439 (or 1260435 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The spelling of 21628481160 in words is "twenty-one billion, six hundred twenty-eight million, four hundred eighty-one thousand, one hundred sixty".