20133153505 has 8 divisors (see below), whose sum is σ = 24179643432. Its totient is φ = 16093283328.

The previous prime is 20133153503. The next prime is 20133153511. The reversal of 20133153505 is 50535133102.

It can be written as a sum of positive squares in 4 ways, for example, as 2646793809 + 17486359696 = 51447^2 + 132236^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20133153505 - 2¹ = 20133153503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20133153503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1648242 + ... + 1660411.

It is an arithmetic number, because the mean of its divisors is an integer number (3022455429).

Almost surely, 2^20133153505 is an apocalyptic number.

It is an amenable number.

20133153505 is a deficient number, since it is larger than the sum of its proper divisors (4046489927).

20133153505 is a wasteful number, since it uses less digits than its factorization.

20133153505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309875.

The product of its (nonzero) digits is 6750, while the sum is 28.

Adding to 20133153505 its reverse (50535133102), we get a palindrome (70668286607).

The spelling of 20133153505 in words is "twenty billion, one hundred thirty-three million, one hundred fifty-three thousand, five hundred five".