21764960059 has 4 divisors (see below), whose sum is σ = 21772323504. Its totient is φ = 21757596616.

The previous prime is 21764959991. The next prime is 21764960081. The reversal of 21764960059 is 95006946712.

It is a happy number.

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 21764960059 - 2¹³ = 21764951867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21764959994 and 21764960021.

It is not an unprimeable number, because it can be changed into a prime (21764960359) 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, 3677287 + ... + 3683200.

It is an arithmetic number, because the mean of its divisors is an integer number (5443080876).

Almost surely, 2^21764960059 is an apocalyptic number.

21764960059 is a deficient number, since it is larger than the sum of its proper divisors (7363445).

21764960059 is an equidigital number, since it uses as much as digits as its factorization.

21764960059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7363444.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 21764960059 in words is "twenty-one billion, seven hundred sixty-four million, nine hundred sixty thousand, fifty-nine".