21152520114436 has 12 divisors (see below), whose sum is σ = 37020327957760. Its totient is φ = 10575283555080.

The previous prime is 21152520114419. The next prime is 21152520114503. The reversal of 21152520114436 is 63441102525112.

It is a junction number, because it is equal to n+sod(n) for n = 21152520114395 and 21152520114404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244076796 + ... + 244163443.

Almost surely, 2^{21152520114436} is an apocalyptic number.

It is an amenable number.

21152520114436 is a deficient number, since it is larger than the sum of its proper divisors (15867807843324).

21152520114436 is a wasteful number, since it uses less digits than its factorization.

21152520114436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488251074 (or 488251072 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

Adding to 21152520114436 its reverse (63441102525112), we get a palindrome (84593622639548).

The spelling of 21152520114436 in words is "twenty-one trillion, one hundred fifty-two billion, five hundred twenty million, one hundred fourteen thousand, four hundred thirty-six".