21733366423 has 4 divisors (see below), whose sum is σ = 23011799760. Its totient is φ = 20454933088.

The previous prime is 21733366393. The next prime is 21733366427. The reversal of 21733366423 is 32466333712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21733366423 - 2²¹ = 21731269271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21733366427) 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, 639216643 + ... + 639216676.

It is an arithmetic number, because the mean of its divisors is an integer number (5752949940).

Almost surely, 2^21733366423 is an apocalyptic number.

21733366423 is a deficient number, since it is larger than the sum of its proper divisors (1278433337).

21733366423 is a wasteful number, since it uses less digits than its factorization.

21733366423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278433336.

The product of its digits is 326592, while the sum is 40.

The spelling of 21733366423 in words is "twenty-one billion, seven hundred thirty-three million, three hundred sixty-six thousand, four hundred twenty-three".