21412520413440 has 288 divisors, whose sum is σ = 77978879750016. Its totient is φ = 4960728514560.

The previous prime is 21412520413399. The next prime is 21412520413463. The reversal of 21412520413440 is 4431402521412.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11767146 + ... + 13464425.

It is an arithmetic number, because the mean of its divisors is an integer number (270759999132).

Almost surely, 2^{21412520413440} is an apocalyptic number.

21412520413440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21412520413440 is an abundant number, since it is smaller than the sum of its proper divisors (56566359336576).

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

21412520413440 is a wasteful number, since it uses less digits than its factorization.

21412520413440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25231625 (or 25231611 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

Adding to 21412520413440 its reverse (4431402521412), we get a palindrome (25843922934852).

The spelling of 21412520413440 in words is "twenty-one trillion, four hundred twelve billion, five hundred twenty million, four hundred thirteen thousand, four hundred forty".