21324477767 has 4 divisors (see below), whose sum is σ = 21324771480. Its totient is φ = 21324184056.

The previous prime is 21324477719. The next prime is 21324477773. The reversal of 21324477767 is 76777442312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21324477767 - 2⁸ = 21324477511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324477467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50084 + ... + 212502.

It is an arithmetic number, because the mean of its divisors is an integer number (5331192870).

Almost surely, 2^21324477767 is an apocalyptic number.

21324477767 is a deficient number, since it is larger than the sum of its proper divisors (293713).

21324477767 is a wasteful number, since it uses less digits than its factorization.

21324477767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293712.

The product of its digits is 2765952, while the sum is 50.

The spelling of 21324477767 in words is "twenty-one billion, three hundred twenty-four million, four hundred seventy-seven thousand, seven hundred sixty-seven".