13833393981 has 32 divisors (see below), whose sum is σ = 20677593600. Its totient is φ = 8152361280.

The previous prime is 13833393979. The next prime is 13833394007. The reversal of 13833393981 is 18939333831.

It is not a de Polignac number, because 13833393981 - 2¹ = 13833393979 is a prime.

It is a super-2 number, since 2×13833393981² (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 (13833393941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3439990 + ... + 3444008.

It is an arithmetic number, because the mean of its divisors is an integer number (646174800).

Almost surely, 2^13833393981 is an apocalyptic number.

13833393981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13833393981 is a deficient number, since it is larger than the sum of its proper divisors (6844199619).

13833393981 is a wasteful number, since it uses less digits than its factorization.

13833393981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6889.

The product of its digits is 1259712, while the sum is 51.

The spelling of 13833393981 in words is "thirteen billion, eight hundred thirty-three million, three hundred ninety-three thousand, nine hundred eighty-one".