21416710721554 has 8 divisors (see below), whose sum is σ = 32247214623360. Its totient is φ = 10667639180436.

The previous prime is 21416710721551. The next prime is 21416710721573. The reversal of 21416710721554 is 45512701761412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21416710721551) 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, 20358089514 + ... + 20358090565.

It is an arithmetic number, because the mean of its divisors is an integer number (4030901827920).

Almost surely, 2^{21416710721554} is an apocalyptic number.

21416710721554 is a deficient number, since it is larger than the sum of its proper divisors (10830503901806).

21416710721554 is a wasteful number, since it uses less digits than its factorization.

21416710721554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40716180344.

The product of its (nonzero) digits is 470400, while the sum is 46.

The spelling of 21416710721554 in words is "twenty-one trillion, four hundred sixteen billion, seven hundred ten million, seven hundred twenty-one thousand, five hundred fifty-four".