20131169399 has 16 divisors (see below), whose sum is σ = 22341536640. Its totient is φ = 17984403360.

The previous prime is 20131169381. The next prime is 20131169407. The reversal of 20131169399 is 99396113102.

It is not a de Polignac number, because 20131169399 - 2¹² = 20131165303 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 (20131166399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3395852 + ... + 3401774.

It is an arithmetic number, because the mean of its divisors is an integer number (1396346040).

Almost surely, 2^20131169399 is an apocalyptic number.

20131169399 is a deficient number, since it is larger than the sum of its proper divisors (2210367241).

20131169399 is a wasteful number, since it uses less digits than its factorization.

20131169399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11230.

The product of its (nonzero) digits is 78732, while the sum is 44.

The spelling of 20131169399 in words is "twenty billion, one hundred thirty-one million, one hundred sixty-nine thousand, three hundred ninety-nine".