21404840847082 has 32 divisors (see below), whose sum is σ = 40032380442240. Its totient is φ = 8339017505280.

The previous prime is 21404840847059. The next prime is 21404840847133. The reversal of 21404840847082 is 28074804840412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1992607 + ... + 6839602.

It is an arithmetic number, because the mean of its divisors is an integer number (1251011888820).

Almost surely, 2^{21404840847082} is an apocalyptic number.

21404840847082 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21404840847082 is a deficient number, since it is larger than the sum of its proper divisors (18627539595158).

21404840847082 is a wasteful number, since it uses less digits than its factorization.

21404840847082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8847966.

The product of its (nonzero) digits is 3670016, while the sum is 52.

The spelling of 21404840847082 in words is "twenty-one trillion, four hundred four billion, eight hundred forty million, eight hundred forty-seven thousand, eighty-two".