13820737 has 4 divisors (see below), whose sum is σ = 15795136. Its totient is φ = 11846340.

The previous prime is 13820713. The next prime is 13820743. The reversal of 13820737 is 73702831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13820737 - 2¹¹ = 13818689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13820699 and 13820708.

It is not an unprimeable number, because it can be changed into a prime (13820747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 987189 + ... + 987202.

It is an arithmetic number, because the mean of its divisors is an integer number (3948784).

Almost surely, 2^13820737 is an apocalyptic number.

It is an amenable number.

13820737 is a deficient number, since it is larger than the sum of its proper divisors (1974399).

13820737 is an equidigital number, since it uses as much as digits as its factorization.

13820737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974398.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 13820737 is about 3717.6251828284. The cubic root of 13820737 is about 239.9811154122.

The spelling of 13820737 in words is "thirteen million, eight hundred twenty thousand, seven hundred thirty-seven".