21417484450 has 24 divisors (see below), whose sum is σ = 40036723200. Its totient is φ = 8523939600.

The previous prime is 21417484397. The next prime is 21417484453. The reversal of 21417484450 is 5448471412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21417484453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1066306 + ... + 1086205.

It is an arithmetic number, because the mean of its divisors is an integer number (1668196800).

Almost surely, 2^21417484450 is an apocalyptic number.

21417484450 is a deficient number, since it is larger than the sum of its proper divisors (18619238750).

21417484450 is a wasteful number, since it uses less digits than its factorization.

21417484450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152722 (or 2152717 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 40.

The spelling of 21417484450 in words is "twenty-one billion, four hundred seventeen million, four hundred eighty-four thousand, four hundred fifty".