13953738381 has 32 divisors (see below), whose sum is σ = 20536685568. Its totient is φ = 8356938240.

The previous prime is 13953738347. The next prime is 13953738389. The reversal of 13953738381 is 18383735931.

It is not a de Polignac number, because 13953738381 - 2¹⁴ = 13953721997 is a prime.

It is a super-2 number, since 2×13953738381² (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 (13953738389) 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, 2375410 + ... + 2381276.

It is an arithmetic number, because the mean of its divisors is an integer number (641771424).

Almost surely, 2^13953738381 is an apocalyptic number.

13953738381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13953738381 is a deficient number, since it is larger than the sum of its proper divisors (6582947187).

13953738381 is a wasteful number, since it uses less digits than its factorization.

13953738381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6721.

The product of its digits is 1632960, while the sum is 51.

The spelling of 13953738381 in words is "thirteen billion, nine hundred fifty-three million, seven hundred thirty-eight thousand, three hundred eighty-one".