21855676360 has 32 divisors (see below), whose sum is σ = 56200311360. Its totient is φ = 7493374656.

The previous prime is 21855676321. The next prime is 21855676363. The reversal of 21855676360 is 6367655812.

It is not an unprimeable number, because it can be changed into a prime (21855676363) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 39027714 + ... + 39028273.

It is an arithmetic number, because the mean of its divisors is an integer number (1756259730).

Almost surely, 2^21855676360 is an apocalyptic number.

21855676360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21855676360 is an abundant number, since it is smaller than the sum of its proper divisors (34344635000).

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

21855676360 is a wasteful number, since it uses less digits than its factorization.

21855676360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78056005 (or 78056001 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 21855676360 in words is "twenty-one billion, eight hundred fifty-five million, six hundred seventy-six thousand, three hundred sixty".