21414289894665 has 16 divisors (see below), whose sum is σ = 34264415208768. Its totient is φ = 11420437484736.

The previous prime is 21414289894651. The next prime is 21414289894693. The reversal of 21414289894665 is 56649898241412.

It is not a de Polignac number, because 21414289894665 - 2¹⁶ = 21414289829129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21414289894665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31977919 + ... + 32640708.

It is an arithmetic number, because the mean of its divisors is an integer number (2141525950548).

Almost surely, 2^{21414289894665} is an apocalyptic number.

It is an amenable number.

21414289894665 is a deficient number, since it is larger than the sum of its proper divisors (12850125314103).

21414289894665 is a wasteful number, since it uses less digits than its factorization.

21414289894665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64640728.

The product of its digits is 238878720, while the sum is 69.

The spelling of 21414289894665 in words is "twenty-one trillion, four hundred fourteen billion, two hundred eighty-nine million, eight hundred ninety-four thousand, six hundred sixty-five".