21415415304 has 64 divisors (see below), whose sum is σ = 57095841600. Its totient is φ = 6670209024.

The previous prime is 21415415209. The next prime is 21415415317. The reversal of 21415415304 is 40351451412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132097 + ... + 245520.

It is an arithmetic number, because the mean of its divisors is an integer number (892122525).

Almost surely, 2^21415415304 is an apocalyptic number.

21415415304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21415415304 is an abundant number, since it is smaller than the sum of its proper divisors (35680426296).

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

21415415304 is a wasteful number, since it uses less digits than its factorization.

21415415304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377782 (or 377778 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 21415415304 its reverse (40351451412), we get a palindrome (61766866716).

The spelling of 21415415304 in words is "twenty-one billion, four hundred fifteen million, four hundred fifteen thousand, three hundred four".