21468576378 has 32 divisors (see below), whose sum is σ = 46691601984. Its totient is φ = 6553204992.

The previous prime is 21468576377. The next prime is 21468576379. The reversal of 21468576378 is 87367586412.

It is an interprime number because it is at equal distance from previous prime (21468576377) and next prime (21468576379).

It is not an unprimeable number, because it can be changed into a prime (21468576377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2840500 + ... + 2848047.

It is an arithmetic number, because the mean of its divisors is an integer number (1459112562).

Almost surely, 2^21468576378 is an apocalyptic number.

21468576378 is an abundant number, since it is smaller than the sum of its proper divisors (25223025606).

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

21468576378 is a wasteful number, since it uses less digits than its factorization.

21468576378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5688606.

The product of its digits is 13547520, while the sum is 57.

The spelling of 21468576378 in words is "twenty-one billion, four hundred sixty-eight million, five hundred seventy-six thousand, three hundred seventy-eight".