21616220443153 has 16 divisors (see below), whose sum is σ = 26162251478784. Its totient is φ = 17435089981440.

The previous prime is 21616220443117. The next prime is 21616220443183. The reversal of 21616220443153 is 35134402261612.

It is not a de Polignac number, because 21616220443153 - 2³⁷ = 21478781489681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21616220443183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16045125 + ... + 17340082.

It is an arithmetic number, because the mean of its divisors is an integer number (1635140717424).

Almost surely, 2^{21616220443153} is an apocalyptic number.

It is an amenable number.

21616220443153 is a deficient number, since it is larger than the sum of its proper divisors (4546031035631).

21616220443153 is a wasteful number, since it uses less digits than its factorization.

21616220443153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33390672.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 21616220443153 in words is "twenty-one trillion, six hundred sixteen billion, two hundred twenty million, four hundred forty-three thousand, one hundred fifty-three".