21152165560053 has 32 divisors (see below), whose sum is σ = 30837034876032. Its totient is φ = 12790230374400.

The previous prime is 21152165559971. The next prime is 21152165560069. The reversal of 21152165560053 is 35006556125112.

It is a happy number.

It is not a de Polignac number, because 21152165560053 - 2⁸ = 21152165559797 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21152165559987 and 21152165560014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152165560093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141969325 + ... + 142118237.

It is an arithmetic number, because the mean of its divisors is an integer number (963657339876).

Almost surely, 2^{21152165560053} is an apocalyptic number.

It is an amenable number.

21152165560053 is a deficient number, since it is larger than the sum of its proper divisors (9684869315979).

21152165560053 is a wasteful number, since it uses less digits than its factorization.

21152165560053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158725.

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 21152165560053 in words is "twenty-one trillion, one hundred fifty-two billion, one hundred sixty-five million, five hundred sixty thousand, fifty-three".