21453224202 has 24 divisors (see below), whose sum is σ = 46519610436. Its totient is φ = 7145286336.

The previous prime is 21453224201. The next prime is 21453224209. The reversal of 21453224202 is 20242235412.

21453224202 is a `hidden beast` number, since 2 + 1 + 453 + 2 + 2 + 4 + 202 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20150086401 + 1303137801 = 141951^2 + 36099^2 .

It is a super-2 number, since 2×21453224202² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21453224201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 459483 + ... + 504014.

Almost surely, 2^21453224202 is an apocalyptic number.

21453224202 is an abundant number, since it is smaller than the sum of its proper divisors (25066386234).

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

21453224202 is a wasteful number, since it uses less digits than its factorization.

21453224202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964742 (or 964739 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 21453224202 its reverse (20242235412), we get a palindrome (41695459614).

The spelling of 21453224202 in words is "twenty-one billion, four hundred fifty-three million, two hundred twenty-four thousand, two hundred two".