20204354511 has 24 divisors (see below), whose sum is σ = 31857907536. Its totient is φ = 12237085440.

The previous prime is 20204354507. The next prime is 20204354537. The reversal of 20204354511 is 11545340202.

20204354511 is a `hidden beast` number, since 2 + 0 + 204 + 3 + 5 + 451 + 1 = 666.

It is not a de Polignac number, because 20204354511 - 2² = 20204354507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204354581) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88041 + ... + 219453.

It is an arithmetic number, because the mean of its divisors is an integer number (1327412814).

Almost surely, 2^20204354511 is an apocalyptic number.

20204354511 is a deficient number, since it is larger than the sum of its proper divisors (11653553025).

20204354511 is a wasteful number, since it uses less digits than its factorization.

20204354511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132983 (or 132980 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 20204354511 its reverse (11545340202), we get a palindrome (31749694713).

The spelling of 20204354511 in words is "twenty billion, two hundred four million, three hundred fifty-four thousand, five hundred eleven".