21152520114440 has 64 divisors (see below), whose sum is σ = 55913654583360. Its totient is φ = 7100146609920.

The previous prime is 21152520114419. The next prime is 21152520114503. The reversal of 21152520114440 is 4441102525112.

It is a junction number, because it is equal to n+sod(n) for n = 21152520114397 and 21152520114406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1848990794 + ... + 1849002233.

It is an arithmetic number, because the mean of its divisors is an integer number (873650852865).

Almost surely, 2^{21152520114440} is an apocalyptic number.

21152520114440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21152520114440 is an abundant number, since it is smaller than the sum of its proper divisors (34761134468920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21152520114440 is a wasteful number, since it uses less digits than its factorization.

21152520114440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697993062 (or 3697993058 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

Adding to 21152520114440 its reverse (4441102525112), we get a palindrome (25593622639552).

The spelling of 21152520114440 in words is "twenty-one trillion, one hundred fifty-two billion, five hundred twenty million, one hundred fourteen thousand, four hundred forty".