20218703 has 2 divisors, whose sum is σ = 20218704. Its totient is φ = 20218702.

The previous prime is 20218697. The next prime is 20218711. The reversal of 20218703 is 30781202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20218703 - 2¹⁰ = 20217679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20218903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10109351 + 10109352.

It is an arithmetic number, because the mean of its divisors is an integer number (10109352).

Almost surely, 2^20218703 is an apocalyptic number.

20218703 is a deficient number, since it is larger than the sum of its proper divisors (1).

20218703 is an equidigital number, since it uses as much as digits as its factorization.

20218703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20218703 is about 4496.5212108918. The cubic root of 20218703 is about 272.4275957231.

Adding to 20218703 its reverse (30781202), we get a palindrome (50999905).

The spelling of 20218703 in words is "twenty million, two hundred eighteen thousand, seven hundred three".