20123401 has 2 divisors, whose sum is σ = 20123402. Its totient is φ = 20123400.

The previous prime is 20123387. The next prime is 20123417. The reversal of 20123401 is 10432102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14478025 + 5645376 = 3805^2 + 2376^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123401 - 2⁷ = 20123273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20123431) 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 as a sum of consecutive naturals, namely, 10061700 + 10061701.

It is an arithmetic number, because the mean of its divisors is an integer number (10061701).

Almost surely, 2^20123401 is an apocalyptic number.

It is an amenable number.

20123401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123401 is an equidigital number, since it uses as much as digits as its factorization.

20123401 is an odious number, because the sum of its binary digits is odd.

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

The square root of 20123401 is about 4485.9113901191. The cubic root of 20123401 is about 271.9988871422.

Adding to 20123401 its reverse (10432102), we get a palindrome (30555503).

The spelling of 20123401 in words is "twenty million, one hundred twenty-three thousand, four hundred one".