20155134203 has 8 divisors (see below), whose sum is σ = 21616232400. Its totient is φ = 18734066208.

The previous prime is 20155134191. The next prime is 20155134229. The reversal of 20155134203 is 30243155102.

It is a happy number.

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 20155134203 - 2¹⁴ = 20155117819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20155134253) 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, 10006508 + ... + 10008521.

It is an arithmetic number, because the mean of its divisors is an integer number (2702029050).

Almost surely, 2^20155134203 is an apocalyptic number.

20155134203 is a deficient number, since it is larger than the sum of its proper divisors (1461098197).

20155134203 is a wasteful number, since it uses less digits than its factorization.

20155134203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20015101.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20155134203 its reverse (30243155102), we get a palindrome (50398289305).

The spelling of 20155134203 in words is "twenty billion, one hundred fifty-five million, one hundred thirty-four thousand, two hundred three".