21470611124065 has 16 divisors (see below), whose sum is σ = 27280507300992. Its totient is φ = 16165987849984.

The previous prime is 21470611124051. The next prime is 21470611124077. The reversal of 21470611124065 is 56042111607412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21470611124065 - 2⁵ = 21470611124033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11640102 + ... + 13357888.

It is an arithmetic number, because the mean of its divisors is an integer number (1705031706312).

Almost surely, 2^{21470611124065} is an apocalyptic number.

It is an amenable number.

21470611124065 is a deficient number, since it is larger than the sum of its proper divisors (5809896176927).

21470611124065 is a wasteful number, since it uses less digits than its factorization.

21470611124065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864856.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 21470611124065 in words is "twenty-one trillion, four hundred seventy billion, six hundred eleven million, one hundred twenty-four thousand, sixty-five".