20196238479 has 4 divisors (see below), whose sum is σ = 26928317976. Its totient is φ = 13464158984.

The previous prime is 20196238477. The next prime is 20196238487. The reversal of 20196238479 is 97483269102.

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 20196238479 - 2¹ = 20196238477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20196238477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3366039744 + ... + 3366039749.

It is an arithmetic number, because the mean of its divisors is an integer number (6732079494).

Almost surely, 2^20196238479 is an apocalyptic number.

20196238479 is a deficient number, since it is larger than the sum of its proper divisors (6732079497).

20196238479 is an equidigital number, since it uses as much as digits as its factorization.

20196238479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6732079496.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 20196238479 in words is "twenty billion, one hundred ninety-six million, two hundred thirty-eight thousand, four hundred seventy-nine".