13981320819 has 80 divisors (see below), whose sum is σ = 22535504640. Its totient is φ = 8618400000.

The previous prime is 13981320809. The next prime is 13981320833. The reversal of 13981320819 is 91802318931.

It is not a de Polignac number, because 13981320819 - 2⁴ = 13981320803 is a prime.

It is a super-2 number, since 2×13981320819² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13981320809) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7353769 + ... + 7355669.

It is an arithmetic number, because the mean of its divisors is an integer number (281693808).

Almost surely, 2^13981320819 is an apocalyptic number.

13981320819 is a deficient number, since it is larger than the sum of its proper divisors (8554183821).

13981320819 is a wasteful number, since it uses less digits than its factorization.

13981320819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074 (or 2065 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 13981320819 in words is "thirteen billion, nine hundred eighty-one million, three hundred twenty thousand, eight hundred nineteen".