13919731485 has 16 divisors (see below), whose sum is σ = 24296258880. Its totient is φ = 6748960640.

The previous prime is 13919731447. The next prime is 13919731487. The reversal of 13919731485 is 58413791931.

It is not a de Polignac number, because 13919731485 - 2⁸ = 13919731229 is a prime.

It is a super-2 number, since 2×13919731485² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13919731487) 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, 42180840 + ... + 42181169.

It is an arithmetic number, because the mean of its divisors is an integer number (1518516180).

Almost surely, 2^13919731485 is an apocalyptic number.

13919731485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13919731485 is a deficient number, since it is larger than the sum of its proper divisors (10376527395).

13919731485 is a wasteful number, since it uses less digits than its factorization.

13919731485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84362028.

The product of its digits is 816480, while the sum is 51.

The spelling of 13919731485 in words is "thirteen billion, nine hundred nineteen million, seven hundred thirty-one thousand, four hundred eighty-five".