20330401 has 16 divisors (see below), whose sum is σ = 25199104. Its totient is φ = 15971904.

The previous prime is 20330371. The next prime is 20330407. The reversal of 20330401 is 10403302.

It is not a de Polignac number, because 20330401 - 2⁵ = 20330369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (20330407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13576 + ... + 14998.

It is an arithmetic number, because the mean of its divisors is an integer number (1574944).

Almost surely, 2^20330401 is an apocalyptic number.

It is an amenable number.

20330401 is a deficient number, since it is larger than the sum of its proper divisors (4868703).

20330401 is a wasteful number, since it uses less digits than its factorization.

20330401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20330401 is about 4508.9245946234. The cubic root of 20330401 is about 272.9283491247.

Adding to 20330401 its reverse (10403302), we get a palindrome (30733703).

The spelling of 20330401 in words is "twenty million, three hundred thirty thousand, four hundred one".