21216030414360 has 64 divisors (see below), whose sum is σ = 67392096616800. Its totient is φ = 5324807632896.

The previous prime is 21216030414307. The next prime is 21216030414389. The reversal of 21216030414360 is 6341403061212.

It is a happy number.

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, 5200005415 + ... + 5200009494.

Almost surely, 2^{21216030414360} is an apocalyptic number.

21216030414360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21216030414360 is an abundant number, since it is smaller than the sum of its proper divisors (46176066202440).

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

21216030414360 is a wasteful number, since it uses less digits than its factorization.

21216030414360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10400014940 (or 10400014936 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

Adding to 21216030414360 its reverse (6341403061212), we get a palindrome (27557433475572).

The spelling of 21216030414360 in words is "twenty-one trillion, two hundred sixteen billion, thirty million, four hundred fourteen thousand, three hundred sixty".