21453614898 has 16 divisors (see below), whose sum is σ = 42974175456. Its totient is φ = 7140047360.

The previous prime is 21453614893. The next prime is 21453614921. The reversal of 21453614898 is 89841635412.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 21453614898.

It is not an unprimeable number, because it can be changed into a prime (21453614893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2785236 + ... + 2792927.

It is an arithmetic number, because the mean of its divisors is an integer number (2685885966).

Almost surely, 2^21453614898 is an apocalyptic number.

21453614898 is an abundant number, since it is smaller than the sum of its proper divisors (21520560558).

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

21453614898 is a wasteful number, since it uses less digits than its factorization.

21453614898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5578809.

The product of its digits is 1658880, while the sum is 51.

The spelling of 21453614898 in words is "twenty-one billion, four hundred fifty-three million, six hundred fourteen thousand, eight hundred ninety-eight".