21050044155153 has 96 divisors (see below), whose sum is σ = 34612998900480. Its totient is φ = 12236882112000.

The previous prime is 21050044155121. The next prime is 21050044155157. The reversal of 21050044155153 is 35155144005012.

21050044155153 is a `hidden beast` number, since 2 + 1 + 0 + 50 + 0 + 4 + 4 + 1 + 551 + 53 = 666.

It is not a de Polignac number, because 21050044155153 - 2⁵ = 21050044155121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21050044155157) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 31224783 + ... + 31891803.

It is an arithmetic number, because the mean of its divisors is an integer number (360552071880).

Almost surely, 2^{21050044155153} is an apocalyptic number.

It is an amenable number.

21050044155153 is a deficient number, since it is larger than the sum of its proper divisors (13562954745327).

21050044155153 is a wasteful number, since it uses less digits than its factorization.

21050044155153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667271 (or 667268 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 21050044155153 in words is "twenty-one trillion, fifty billion, forty-four million, one hundred fifty-five thousand, one hundred fifty-three".