21768734060 has 24 divisors (see below), whose sum is σ = 45722090736. Its totient is φ = 8706017600.

The previous prime is 21768734051. The next prime is 21768734063. The reversal of 21768734060 is 6043786712.

It is not an unprimeable number, because it can be changed into a prime (21768734063) by changing a digit.

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, 32819 + ... + 211221.

It is an arithmetic number, because the mean of its divisors is an integer number (1905087114).

Almost surely, 2^21768734060 is an apocalyptic number.

21768734060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21768734060 is an abundant number, since it is smaller than the sum of its proper divisors (23953356676).

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

21768734060 is a wasteful number, since it uses less digits than its factorization.

21768734060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184513 (or 184511 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 21768734060 in words is "twenty-one billion, seven hundred sixty-eight million, seven hundred thirty-four thousand, sixty".