21714783984 has 60 divisors (see below), whose sum is σ = 60810649536. Its totient is φ = 7233566976.

The previous prime is 21714783983. The next prime is 21714783997. The reversal of 21714783984 is 48938741712.

21714783984 is a `hidden beast` number, since 21 + 71 + 478 + 3 + 9 + 84 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21714783984.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21714783983) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 177532 + ... + 273764.

Almost surely, 2^21714783984 is an apocalyptic number.

21714783984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21714783984 is an abundant number, since it is smaller than the sum of its proper divisors (39095865552).

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

21714783984 is a wasteful number, since it uses less digits than its factorization.

21714783984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97814 (or 97805 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The spelling of 21714783984 in words is "twenty-one billion, seven hundred fourteen million, seven hundred eighty-three thousand, nine hundred eighty-four".