13820506 has 16 divisors (see below), whose sum is σ = 24018624. Its totient is φ = 5841504.

The previous prime is 13820503. The next prime is 13820509. The reversal of 13820506 is 60502831.

It is a happy number.

13820506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13820503) and next prime (13820509).

It is not an unprimeable number, because it can be changed into a prime (13820503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5740 + ... + 7783.

It is an arithmetic number, because the mean of its divisors is an integer number (1501164).

Almost surely, 2^13820506 is an apocalyptic number.

13820506 is a deficient number, since it is larger than the sum of its proper divisors (10198118).

13820506 is a wasteful number, since it uses less digits than its factorization.

13820506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13605.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 13820506 is about 3717.5941144778. The cubic root of 13820506 is about 239.9797783888.

The spelling of 13820506 in words is "thirteen million, eight hundred twenty thousand, five hundred six".