20535503 has 2 divisors, whose sum is σ = 20535504. Its totient is φ = 20535502.

The previous prime is 20535499. The next prime is 20535533. The reversal of 20535503 is 30553502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20535503 - 2² = 20535499 is a prime.

It is a Sophie Germain 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 (20535533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10267751 + 10267752.

It is an arithmetic number, because the mean of its divisors is an integer number (10267752).

Almost surely, 2^20535503 is an apocalyptic number.

20535503 is a deficient number, since it is larger than the sum of its proper divisors (1).

20535503 is an equidigital number, since it uses as much as digits as its factorization.

20535503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 23.

The square root of 20535503 is about 4531.6115235090. The cubic root of 20535503 is about 273.8430868489.

The spelling of 20535503 in words is "twenty million, five hundred thirty-five thousand, five hundred three".