20280103 has 2 divisors, whose sum is σ = 20280104. Its totient is φ = 20280102.

The previous prime is 20280101. The next prime is 20280109. The reversal of 20280103 is 30108202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20280103 - 2¹ = 20280101 is a prime.

It is a super-2 number, since 2×20280103² = 822565155381218, which contains 22 as substring.

Together with 20280101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20280101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10140051 + 10140052.

It is an arithmetic number, because the mean of its divisors is an integer number (10140052).

Almost surely, 2^20280103 is an apocalyptic number.

20280103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20280103 is an equidigital number, since it uses as much as digits as its factorization.

20280103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 20280103 is about 4503.3435356410. The cubic root of 20280103 is about 272.7030857102.

Adding to 20280103 its reverse (30108202), we get a palindrome (50388305).

The spelling of 20280103 in words is "twenty million, two hundred eighty thousand, one hundred three".