20361401 has 2 divisors, whose sum is σ = 20361402. Its totient is φ = 20361400.

The previous prime is 20361377. The next prime is 20361409. The reversal of 20361401 is 10416302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20259001 + 102400 = 4501^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 20361401 - 2⁶ = 20361337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20361401.

It is not a weakly prime, because it can be changed into another prime (20361409) 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, 10180700 + 10180701.

It is an arithmetic number, because the mean of its divisors is an integer number (10180701).

Almost surely, 2^20361401 is an apocalyptic number.

It is an amenable number.

20361401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20361401 is an equidigital number, since it uses as much as digits as its factorization.

20361401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20361401 is about 4512.3609119839. The cubic root of 20361401 is about 273.0669999741.

Adding to 20361401 its reverse (10416302), we get a palindrome (30777703).

The spelling of 20361401 in words is "twenty million, three hundred sixty-one thousand, four hundred one".