20012401 has 2 divisors, whose sum is σ = 20012402. Its totient is φ = 20012400.

The previous prime is 20012393. The next prime is 20012411. The reversal of 20012401 is 10421002.

It is an a-pointer prime, because the next prime (20012411) can be obtained adding 20012401 to its sum of digits (10).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19936225 + 76176 = 4465^2 + 276^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012401 - 2³ = 20012393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20012411) 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 as a sum of consecutive naturals, namely, 10006200 + 10006201.

It is an arithmetic number, because the mean of its divisors is an integer number (10006201).

Almost surely, 2^20012401 is an apocalyptic number.

It is an amenable number.

20012401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012401 is an equidigital number, since it uses as much as digits as its factorization.

20012401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 20012401 is about 4473.5222140948. The cubic root of 20012401 is about 271.4978525561.

Adding to 20012401 its reverse (10421002), we get a palindrome (30433403).

The spelling of 20012401 in words is "twenty million, twelve thousand, four hundred one".