20041387 has 2 divisors, whose sum is σ = 20041388. Its totient is φ = 20041386.

The previous prime is 20041379. The next prime is 20041391. The reversal of 20041387 is 78314002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20041387 - 2³ = 20041379 is a prime.

It is not a weakly prime, because it can be changed into another prime (20041327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020693 + 10020694.

It is an arithmetic number, because the mean of its divisors is an integer number (10020694).

Almost surely, 2^20041387 is an apocalyptic number.

20041387 is a deficient number, since it is larger than the sum of its proper divisors (1).

20041387 is an equidigital number, since it uses as much as digits as its factorization.

20041387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20041387 is about 4476.7607709146. The cubic root of 20041387 is about 271.6288686587.

Adding to 20041387 its reverse (78314002), we get a palindrome (98355389).

The spelling of 20041387 in words is "twenty million, forty-one thousand, three hundred eighty-seven".