21455450303300 has 72 divisors (see below), whose sum is σ = 50262329229000. Its totient is φ = 7902643000320.

The previous prime is 21455450303299. The next prime is 21455450303423. The reversal of 21455450303300 is 330305455412.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 5388628680964 + 16066821622336 = 2321342^2 + 4008344^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19644575 + ... + 20707974.

Almost surely, 2^{21455450303300} is an apocalyptic number.

21455450303300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21455450303300 is an abundant number, since it is smaller than the sum of its proper divisors (28806878925700).

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

21455450303300 is a wasteful number, since it uses less digits than its factorization.

21455450303300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40352985 (or 40352978 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 21455450303300 its reverse (330305455412), we get a palindrome (21785755758712).

The spelling of 21455450303300 in words is "twenty-one trillion, four hundred fifty-five billion, four hundred fifty million, three hundred three thousand, three hundred".