20681060203 has 4 divisors (see below), whose sum is σ = 21394200240. Its totient is φ = 19967920168.

The previous prime is 20681060161. The next prime is 20681060233. The reversal of 20681060203 is 30206018602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30206018602 = 2 ⋅15103009301.

It is a cyclic number.

It is not a de Polignac number, because 20681060203 - 2²¹ = 20678963051 is a prime.

It is a super-2 number, since 2×20681060203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20681060233) 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, 356569975 + ... + 356570032.

It is an arithmetic number, because the mean of its divisors is an integer number (5348550060).

Almost surely, 2^20681060203 is an apocalyptic number.

20681060203 is a deficient number, since it is larger than the sum of its proper divisors (713140037).

20681060203 is an equidigital number, since it uses as much as digits as its factorization.

20681060203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713140036.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 20681060203 its reverse (30206018602), we get a palindrome (50887078805).

The spelling of 20681060203 in words is "twenty billion, six hundred eighty-one million, sixty thousand, two hundred three".