20535140203 has 4 divisors (see below), whose sum is σ = 20613220848. Its totient is φ = 20457059560.

The previous prime is 20535140201. The next prime is 20535140231. The reversal of 20535140203 is 30204153502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30204153502 = 2 ⋅15102076751.

It is a cyclic number.

It is not a de Polignac number, because 20535140203 - 2¹ = 20535140201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20535140201) 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, 39039928 + ... + 39040453.

It is an arithmetic number, because the mean of its divisors is an integer number (5153305212).

Almost surely, 2^20535140203 is an apocalyptic number.

20535140203 is a deficient number, since it is larger than the sum of its proper divisors (78080645).

20535140203 is an equidigital number, since it uses as much as digits as its factorization.

20535140203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78080644.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 20535140203 its reverse (30204153502), we get a palindrome (50739293705).

The spelling of 20535140203 in words is "twenty billion, five hundred thirty-five million, one hundred forty thousand, two hundred three".