27212321840 has 80 divisors (see below), whose sum is σ = 69054107040. Its totient is φ = 9890549760.

The previous prime is 27212321839. The next prime is 27212321849. The reversal of 27212321840 is 4812321272.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 27212321797 and 27212321806.

It is not an unprimeable number, because it can be changed into a prime (27212321849) 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 15 ways as a sum of consecutive naturals, for example, 2138216 + ... + 2150904.

It is an arithmetic number, because the mean of its divisors is an integer number (863176338).

Almost surely, 2^27212321840 is an apocalyptic number.

27212321840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27212321840 is an abundant number, since it is smaller than the sum of its proper divisors (41841785200).

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

27212321840 is a wasteful number, since it uses less digits than its factorization.

27212321840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15150 (or 15144 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The spelling of 27212321840 in words is "twenty-seven billion, two hundred twelve million, three hundred twenty-one thousand, eight hundred forty".