20530401 has 8 divisors (see below), whose sum is σ = 28257024. Its totient is φ = 13245360.

The previous prime is 20530397. The next prime is 20530417. The reversal of 20530401 is 10403502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20530401 - 2² = 20530397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20530481) 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 7 ways as a sum of consecutive naturals, for example, 110286 + ... + 110471.

It is an arithmetic number, because the mean of its divisors is an integer number (3532128).

Almost surely, 2^20530401 is an apocalyptic number.

It is an amenable number.

20530401 is a deficient number, since it is larger than the sum of its proper divisors (7726623).

20530401 is a wasteful number, since it uses less digits than its factorization.

20530401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220791.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20530401 is about 4531.0485541428. The cubic root of 20530401 is about 273.8204064020.

Adding to 20530401 its reverse (10403502), we get a palindrome (30933903).

The spelling of 20530401 in words is "twenty million, five hundred thirty thousand, four hundred one".