21423065773767 has 8 divisors (see below), whose sum is σ = 32644671655296. Its totient is φ = 12241751870712.

The previous prime is 21423065773729. The next prime is 21423065773771. The reversal of 21423065773767 is 76737756032412.

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

It is not a de Polignac number, because 21423065773767 - 2¹⁰ = 21423065772743 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 21423065773767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21423065773867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510072994593 + ... + 510072994634.

It is an arithmetic number, because the mean of its divisors is an integer number (4080583956912).

Almost surely, 2^{21423065773767} is an apocalyptic number.

21423065773767 is a deficient number, since it is larger than the sum of its proper divisors (11221605881529).

21423065773767 is a wasteful number, since it uses less digits than its factorization.

21423065773767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020145989237.

The product of its (nonzero) digits is 62233920, while the sum is 60.

The spelling of 21423065773767 in words is "twenty-one trillion, four hundred twenty-three billion, sixty-five million, seven hundred seventy-three thousand, seven hundred sixty-seven".