21324615051416 has 32 divisors (see below), whose sum is σ = 40123073558880. Its totient is φ = 10625147328000.

The previous prime is 21324615051391. The next prime is 21324615051479. The reversal of 21324615051416 is 61415051642312.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8050160 + ... + 10366016.

It is an arithmetic number, because the mean of its divisors is an integer number (1253846048715).

Almost surely, 2^{21324615051416} is an apocalyptic number.

It is an amenable number.

21324615051416 is a deficient number, since it is larger than the sum of its proper divisors (18798458507464).

21324615051416 is a wasteful number, since it uses less digits than its factorization.

21324615051416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319875 (or 2319871 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

Adding to 21324615051416 its reverse (61415051642312), we get a palindrome (82739666693728).

The spelling of 21324615051416 in words is "twenty-one trillion, three hundred twenty-four billion, six hundred fifteen million, fifty-one thousand, four hundred sixteen".