20652503 has 4 divisors (see below), whose sum is σ = 20935488. Its totient is φ = 20369520.

The previous prime is 20652497. The next prime is 20652521. The reversal of 20652503 is 30525602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20652503 - 2⁶ = 20652439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20652523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141383 + ... + 141528.

It is an arithmetic number, because the mean of its divisors is an integer number (5233872).

Almost surely, 2^20652503 is an apocalyptic number.

20652503 is a deficient number, since it is larger than the sum of its proper divisors (282985).

20652503 is an equidigital number, since it uses as much as digits as its factorization.

20652503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282984.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20652503 is about 4544.5025030249. The cubic root of 20652503 is about 274.3621713655.

The spelling of 20652503 in words is "twenty million, six hundred fifty-two thousand, five hundred three".