21083408956089 has 6 divisors (see below), whose sum is σ = 30453812936586. Its totient is φ = 14055605970720.

The previous prime is 21083408956081. The next prime is 21083408956117. The reversal of 21083408956089 is 98065980438012.

21083408956089 is a `hidden beast` number, since 2 + 1 + 0 + 8 + 3 + 408 + 95 + 60 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20025580250025 + 1057828706064 = 4474995^2 + 1028508^2 .

It is not a de Polignac number, because 21083408956089 - 2³ = 21083408956081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21083408956081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1171300497552 + ... + 1171300497569.

It is an arithmetic number, because the mean of its divisors is an integer number (5075635489431).

Almost surely, 2^{21083408956089} is an apocalyptic number.

It is an amenable number.

21083408956089 is a deficient number, since it is larger than the sum of its proper divisors (9370403980497).

21083408956089 is a wasteful number, since it uses less digits than its factorization.

21083408956089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342600995127 (or 2342600995124 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The spelling of 21083408956089 in words is "twenty-one trillion, eighty-three billion, four hundred eight million, nine hundred fifty-six thousand, eighty-nine".