20343233155 has 16 divisors (see below), whose sum is σ = 27908665344. Its totient is φ = 13944958560.

The previous prime is 20343233147. The next prime is 20343233191. The reversal of 20343233155 is 55133234302.

It is not a de Polignac number, because 20343233155 - 2³ = 20343233147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9670 + ... + 201940.

It is an arithmetic number, because the mean of its divisors is an integer number (1744291584).

Almost surely, 2^20343233155 is an apocalyptic number.

20343233155 is a deficient number, since it is larger than the sum of its proper divisors (7565432189).

20343233155 is a wasteful number, since it uses less digits than its factorization.

20343233155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195306.

The product of its (nonzero) digits is 32400, while the sum is 31.

Adding to 20343233155 its reverse (55133234302), we get a palindrome (75476467457).

The spelling of 20343233155 in words is "twenty billion, three hundred forty-three million, two hundred thirty-three thousand, one hundred fifty-five".