20284903 has 2 divisors, whose sum is σ = 20284904. Its totient is φ = 20284902.

The previous prime is 20284897. The next prime is 20284937. The reversal of 20284903 is 30948202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20284903 - 2²¹ = 18187751 is a prime.

It is a super-2 number, since 2×20284903² = 822954579438818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20284973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10142451 + 10142452.

It is an arithmetic number, because the mean of its divisors is an integer number (10142452).

Almost surely, 2^20284903 is an apocalyptic number.

20284903 is a deficient number, since it is larger than the sum of its proper divisors (1).

20284903 is an equidigital number, since it uses as much as digits as its factorization.

20284903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20284903 is about 4503.8764414668. The cubic root of 20284903 is about 272.7245989401.

The spelling of 20284903 in words is "twenty million, two hundred eighty-four thousand, nine hundred three".