20337171477479 has 4 divisors (see below), whose sum is σ = 20346661526976. Its totient is φ = 20327681427984.

The previous prime is 20337171477473. The next prime is 20337171477587. The reversal of 20337171477479 is 97477417173302.

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 20337171477479 - 2⁴ = 20337171477463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20337171477473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4745021534 + ... + 4745025819.

It is an arithmetic number, because the mean of its divisors is an integer number (5086665381744).

Almost surely, 2^{20337171477479} is an apocalyptic number.

20337171477479 is a deficient number, since it is larger than the sum of its proper divisors (9490049497).

20337171477479 is an equidigital number, since it uses as much as digits as its factorization.

20337171477479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9490049496.

The product of its (nonzero) digits is 43563744, while the sum is 62.

The spelling of 20337171477479 in words is "twenty trillion, three hundred thirty-seven billion, one hundred seventy-one million, four hundred seventy-seven thousand, four hundred seventy-nine".