21366360914472 has 480 divisors, whose sum is σ = 73344513290400. Its totient is φ = 5778309954816.

The previous prime is 21366360914449. The next prime is 21366360914531. The reversal of 21366360914472 is 27441906366312.

21366360914472 is a `hidden beast` number, since 2 + 13 + 6 + 6 + 3 + 609 + 14 + 4 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 716087938 + ... + 716117774.

It is an arithmetic number, because the mean of its divisors is an integer number (152801069355).

Almost surely, 2^{21366360914472} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21366360914472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36672256645200).

21366360914472 is an abundant number, since it is smaller than the sum of its proper divisors (51978152375928).

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

21366360914472 is a wasteful number, since it uses less digits than its factorization.

21366360914472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31075 (or 31055 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 54.

The spelling of 21366360914472 in words is "twenty-one trillion, three hundred sixty-six billion, three hundred sixty million, nine hundred fourteen thousand, four hundred seventy-two".