20233133505 has 64 divisors (see below), whose sum is σ = 38760395520. Its totient is φ = 9954897408.

The previous prime is 20233133483. The next prime is 20233133507. The reversal of 20233133505 is 50533133202.

20233133505 is a `hidden beast` number, since 2 + 0 + 23 + 3 + 133 + 505 = 666.

It is not a de Polignac number, because 20233133505 - 2¹² = 20233129409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20233133507) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4706517 + ... + 4710813.

It is an arithmetic number, because the mean of its divisors is an integer number (605631180).

Almost surely, 2^20233133505 is an apocalyptic number.

It is an amenable number.

20233133505 is a deficient number, since it is larger than the sum of its proper divisors (18527262015).

20233133505 is a wasteful number, since it uses less digits than its factorization.

20233133505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007 (or 7001 counting only the distinct ones).

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

Adding to 20233133505 its reverse (50533133202), we get a palindrome (70766266707).

The spelling of 20233133505 in words is "twenty billion, two hundred thirty-three million, one hundred thirty-three thousand, five hundred five".