20321401 has 2 divisors, whose sum is σ = 20321402. Its totient is φ = 20321400.

The previous prime is 20321387. The next prime is 20321417. The reversal of 20321401 is 10412302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 251001 = 4480^2 + 501^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321401 - 2⁵ = 20321369 is a prime.

It is not a weakly prime, because it can be changed into another prime (20321201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160700 + 10160701.

It is an arithmetic number, because the mean of its divisors is an integer number (10160701).

Almost surely, 2^20321401 is an apocalyptic number.

It is an amenable number.

20321401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321401 is an equidigital number, since it uses as much as digits as its factorization.

20321401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20321401 is about 4507.9264634641. The cubic root of 20321401 is about 272.8880692552. Note that the first 3 decimals are identical.

Adding to 20321401 its reverse (10412302), we get a palindrome (30733703).

Subtracting from 20321401 its reverse (10412302), we obtain a palindrome (9909099).

The spelling of 20321401 in words is "twenty million, three hundred twenty-one thousand, four hundred one".