21782574914 has 8 divisors (see below), whose sum is σ = 32747619600. Its totient is φ = 10866701716.

The previous prime is 21782574893. The next prime is 21782574941. The reversal of 21782574914 is 41947528712.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 12291764 + ... + 12293535.

It is an arithmetic number, because the mean of its divisors is an integer number (4093452450).

Almost surely, 2^21782574914 is an apocalyptic number.

21782574914 is a deficient number, since it is larger than the sum of its proper divisors (10965044686).

21782574914 is a wasteful number, since it uses less digits than its factorization.

21782574914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24585744.

The product of its digits is 1128960, while the sum is 50.

The spelling of 21782574914 in words is "twenty-one billion, seven hundred eighty-two million, five hundred seventy-four thousand, nine hundred fourteen".