20030653 has 4 divisors (see below), whose sum is σ = 20572060. Its totient is φ = 19489248.

The previous prime is 20030629. The next prime is 20030657. The reversal of 20030653 is 35603002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35603002 = 2 ⋅17801501.

It can be written as a sum of positive squares in 2 ways, for example, as 12089529 + 7941124 = 3477^2 + 2818^2 .

It is a cyclic number.

It is not a de Polignac number, because 20030653 - 2¹³ = 20022461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20030653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270648 + ... + 270721.

It is an arithmetic number, because the mean of its divisors is an integer number (5143015).

Almost surely, 2^20030653 is an apocalyptic number.

It is an amenable number.

20030653 is a deficient number, since it is larger than the sum of its proper divisors (541407).

20030653 is an equidigital number, since it uses as much as digits as its factorization.

20030653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541406.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 20030653 is about 4475.5617524507. The cubic root of 20030653 is about 271.5803659450.

Adding to 20030653 its reverse (35603002), we get a palindrome (55633655).

The spelling of 20030653 in words is "twenty million, thirty thousand, six hundred fifty-three".