21253100330416 has 20 divisors (see below), whose sum is σ = 41217821671824. Its totient is φ = 10616243124800.

The previous prime is 21253100330411. The next prime is 21253100330471. The reversal of 21253100330416 is 61403300135212.

It is not an unprimeable number, because it can be changed into a prime (21253100330411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644173015 + ... + 644206006.

Almost surely, 2^{21253100330416} is an apocalyptic number.

It is an amenable number.

21253100330416 is a deficient number, since it is larger than the sum of its proper divisors (19964721341408).

21253100330416 is a wasteful number, since it uses less digits than its factorization.

21253100330416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288380060 (or 1288380054 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 21253100330416 its reverse (61403300135212), we get a palindrome (82656400465628).

The spelling of 21253100330416 in words is "twenty-one trillion, two hundred fifty-three billion, one hundred million, three hundred thirty thousand, four hundred sixteen".