13013805 has 16 divisors (see below), whose sum is σ = 23796864. Its totient is φ = 5949120.

The previous prime is 13013773. The next prime is 13013813. The reversal of 13013805 is 50831031.

13013805 = T₆₁₁ + T₆₁₂ + ... + T₆₇₃.

It is a happy number.

13013805 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13013805 - 2⁵ = 13013773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61866 + ... + 62075.

It is an arithmetic number, because the mean of its divisors is an integer number (1487304).

Almost surely, 2^13013805 is an apocalyptic number.

13013805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13013805 is a deficient number, since it is larger than the sum of its proper divisors (10783059).

13013805 is a wasteful number, since it uses less digits than its factorization.

13013805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123956.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 13013805 is about 3607.4651765471. The cubic root of 13013805 is about 235.2166705466.

Adding to 13013805 its reverse (50831031), we get a palindrome (63844836).

The spelling of 13013805 in words is "thirteen million, thirteen thousand, eight hundred five".