20870063 has 2 divisors, whose sum is σ = 20870064. Its totient is φ = 20870062.

The previous prime is 20870051. The next prime is 20870071. The reversal of 20870063 is 36007802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20870063 - 2¹² = 20865967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20870023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10435031 + 10435032.

It is an arithmetic number, because the mean of its divisors is an integer number (10435032).

Almost surely, 2^20870063 is an apocalyptic number.

20870063 is a deficient number, since it is larger than the sum of its proper divisors (1).

20870063 is an equidigital number, since it uses as much as digits as its factorization.

20870063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20870063 is about 4568.3764074340. The cubic root of 20870063 is about 275.3222140539.

Adding to 20870063 its reverse (36007802), we get a palindrome (56877865).

The spelling of 20870063 in words is "twenty million, eight hundred seventy thousand, sixty-three".