20611379 has 2 divisors, whose sum is σ = 20611380. Its totient is φ = 20611378.

The previous prime is 20611369. The next prime is 20611391. The reversal of 20611379 is 97311602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20611379 is a prime.

It is not a weakly prime, because it can be changed into another prime (20611309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10305689 + 10305690.

It is an arithmetic number, because the mean of its divisors is an integer number (10305690).

Almost surely, 2^20611379 is an apocalyptic number.

20611379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20611379 is an equidigital number, since it uses as much as digits as its factorization.

20611379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 20611379 is about 4539.9756607277. The cubic root of 20611379 is about 274.1799437814.

The spelling of 20611379 in words is "twenty million, six hundred eleven thousand, three hundred seventy-nine".