20215103 has 2 divisors, whose sum is σ = 20215104. Its totient is φ = 20215102.

The previous prime is 20215099. The next prime is 20215109. The reversal of 20215103 is 30151202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20215103 - 2² = 20215099 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20215109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10107551 + 10107552.

It is an arithmetic number, because the mean of its divisors is an integer number (10107552).

Almost surely, 2^20215103 is an apocalyptic number.

20215103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20215103 is an equidigital number, since it uses as much as digits as its factorization.

20215103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 20215103 is about 4496.1208836062. The cubic root of 20215103 is about 272.4114259164.

Adding to 20215103 its reverse (30151202), we get a palindrome (50366305).

The spelling of 20215103 in words is "twenty million, two hundred fifteen thousand, one hundred three".