20513035233 has 12 divisors (see below), whose sum is σ = 30319008720. Its totient is φ = 13357325016.

The previous prime is 20513035223. The next prime is 20513035267. The reversal of 20513035233 is 33253031502.

20513035233 is a `hidden beast` number, since 2 + 0 + 5 + 130 + 3 + 523 + 3 = 666.

It is not a de Polignac number, because 20513035233 - 2⁵ = 20513035201 is a prime.

It is a super-2 number, since 2×20513035233² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20513035197 and 20513035206.

It is not an unprimeable number, because it can be changed into a prime (20513035223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26502243 + ... + 26503016.

It is an arithmetic number, because the mean of its divisors is an integer number (2526584060).

Almost surely, 2^20513035233 is an apocalyptic number.

It is an amenable number.

20513035233 is a deficient number, since it is larger than the sum of its proper divisors (9805973487).

20513035233 is a wasteful number, since it uses less digits than its factorization.

20513035233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53005308 (or 53005305 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 27.

Adding to 20513035233 its reverse (33253031502), we get a palindrome (53766066735).

The spelling of 20513035233 in words is "twenty billion, five hundred thirteen million, thirty-five thousand, two hundred thirty-three".