21216601450432 has 112 divisors (see below), whose sum is σ = 42343016631552. Its totient is φ = 10547742136320.

The previous prime is 21216601450397. The next prime is 21216601450453. The reversal of 21216601450432 is 23405410661212.

It is a junction number, because it is equal to n+sod(n) for n = 21216601450391 and 21216601450400.

It is a congruent number.

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, 17784242028 + ... + 17784243220.

It is an arithmetic number, because the mean of its divisors is an integer number (378062648496).

Almost surely, 2^{21216601450432} is an apocalyptic number.

It is an amenable number.

21216601450432 is a deficient number, since it is larger than the sum of its proper divisors (21126415181120).

21216601450432 is a wasteful number, since it uses less digits than its factorization.

21216601450432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3306 (or 3296 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 21216601450432 in words is "twenty-one trillion, two hundred sixteen billion, six hundred one million, four hundred fifty thousand, four hundred thirty-two".