20203002011 has 4 divisors (see below), whose sum is σ = 21391413912. Its totient is φ = 19014590112.

The previous prime is 20203001999. The next prime is 20203002019. The reversal of 20203002011 is 11020030202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11020030202 = 2 ⋅5510015101.

It is a cyclic number.

It is not a de Polignac number, because 20203002011 - 2¹⁸ = 20202739867 is a prime.

It is a super-2 number, since 2×20203002011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20203001983 and 20203002001.

It is not an unprimeable number, because it can be changed into a prime (20203002019) 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, 594205925 + ... + 594205958.

It is an arithmetic number, because the mean of its divisors is an integer number (5347853478).

Almost surely, 2^20203002011 is an apocalyptic number.

20203002011 is a deficient number, since it is larger than the sum of its proper divisors (1188411901).

20203002011 is a wasteful number, since it uses less digits than its factorization.

20203002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188411900.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20203002011 its reverse (11020030202), we get a palindrome (31223032213).

The spelling of 20203002011 in words is "twenty billion, two hundred three million, two thousand, eleven".