21416079318001 has 3 divisors (see below), whose sum is σ = 21416083945753. Its totient is φ = 21416074690250.

The previous prime is 21416079317929. The next prime is 21416079318047. The reversal of 21416079318001 is 10081397061412.

It is a happy number.

The square root of 21416079318001 is 4627751.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 21416079318001 - 2¹³ = 21416079309809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21416079318401) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2313876 + ... + 6941626.

Almost surely, 2^{21416079318001} is an apocalyptic number.

21416079318001 is the 4627751-st square number.

21416079318001 is the 2313876-th centered octagonal number.

It is an amenable number.

21416079318001 is a deficient number, since it is larger than the sum of its proper divisors (4627752).

21416079318001 is an frugal number, since it uses more digits than its factorization.

21416079318001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9255502 (or 4627751 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 21416079318001 in words is "twenty-one trillion, four hundred sixteen billion, seventy-nine million, three hundred eighteen thousand, one".