21224163253032 has 48 divisors (see below), whose sum is σ = 57814375369140. Its totient is φ = 7033826738688.

The previous prime is 21224163253031. The next prime is 21224163253037. The reversal of 21224163253032 is 23035236142212.

21224163253032 is a `hidden beast` number, since 2 + 1 + 2 + 24 + 1 + 6 + 325 + 303 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17380344212676 + 3843819040356 = 4168974^2 + 1960566^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21224163253031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 851952993 + ... + 851977904.

Almost surely, 2^{21224163253032} is an apocalyptic number.

It is an amenable number.

21224163253032 is an abundant number, since it is smaller than the sum of its proper divisors (36590212116108).

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

21224163253032 is a wasteful number, since it uses less digits than its factorization.

21224163253032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703931082 (or 1703931075 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 21224163253032 its reverse (23035236142212), we get a palindrome (44259399395244).

The spelling of 21224163253032 in words is "twenty-one trillion, two hundred twenty-four billion, one hundred sixty-three million, two hundred fifty-three thousand, thirty-two".