13388920749 has 12 divisors (see below), whose sum is σ = 19341743616. Its totient is φ = 8924935752.

The previous prime is 13388920723. The next prime is 13388920757. The reversal of 13388920749 is 94702988331.

13388920749 is a `hidden beast` number, since 13 + 388 + 9 + 207 + 49 = 666.

It is not a de Polignac number, because 13388920749 - 2¹³ = 13388912557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13388920695 and 13388920704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13388920759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4474 + ... + 163700.

It is an arithmetic number, because the mean of its divisors is an integer number (1611811968).

Almost surely, 2^13388920749 is an apocalyptic number.

It is an amenable number.

13388920749 is a deficient number, since it is larger than the sum of its proper divisors (5952822867).

13388920749 is a wasteful number, since it uses less digits than its factorization.

13388920749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168576 (or 168573 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 13388920749 in words is "thirteen billion, three hundred eighty-eight million, nine hundred twenty thousand, seven hundred forty-nine".