21450035212544 has 36 divisors (see below), whose sum is σ = 42932947029504. Its totient is φ = 10695794078208.

The previous prime is 21450035212523. The next prime is 21450035212561. The reversal of 21450035212544 is 44521253005412.

It is a junction number, because it is equal to n+sod(n) for n = 21450035212498 and 21450035212507.

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, 114060272 + ... + 114248175.

Almost surely, 2^{21450035212544} is an apocalyptic number.

It is an amenable number.

21450035212544 is an abundant number, since it is smaller than the sum of its proper divisors (21482911816960).

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

21450035212544 is an equidigital number, since it uses as much as digits as its factorization.

21450035212544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228308830 (or 228308816 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 21450035212544 its reverse (44521253005412), we get a palindrome (65971288217956).

The spelling of 21450035212544 in words is "twenty-one trillion, four hundred fifty billion, thirty-five million, two hundred twelve thousand, five hundred forty-four".