20198839479 has 64 divisors (see below), whose sum is σ = 33977416704. Its totient is φ = 10388238336.

The previous prime is 20198839457. The next prime is 20198839481. The reversal of 20198839479 is 97493889102.

It is not a de Polignac number, because 20198839479 - 2⁷ = 20198839351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20198839279) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8885287 + ... + 8887559.

It is an arithmetic number, because the mean of its divisors is an integer number (530897136).

Almost surely, 2^20198839479 is an apocalyptic number.

20198839479 is a deficient number, since it is larger than the sum of its proper divisors (13778577225).

20198839479 is a wasteful number, since it uses less digits than its factorization.

20198839479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096.

The product of its (nonzero) digits is 7838208, while the sum is 60.

The spelling of 20198839479 in words is "twenty billion, one hundred ninety-eight million, eight hundred thirty-nine thousand, four hundred seventy-nine".