20322005155 has 4 divisors (see below), whose sum is σ = 24386406192. Its totient is φ = 16257604120.

The previous prime is 20322005147. The next prime is 20322005213. The reversal of 20322005155 is 55150022302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55150022302 = 2 ⋅27575011151.

It is not a de Polignac number, because 20322005155 - 2³ = 20322005147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2032200511 + ... + 2032200520.

It is an arithmetic number, because the mean of its divisors is an integer number (6096601548).

Almost surely, 2^20322005155 is an apocalyptic number.

20322005155 is a deficient number, since it is larger than the sum of its proper divisors (4064401037).

20322005155 is an equidigital number, since it uses as much as digits as its factorization.

20322005155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4064401036.

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 20322005155 its reverse (55150022302), we get a palindrome (75472027457).

The spelling of 20322005155 in words is "twenty billion, three hundred twenty-two million, five thousand, one hundred fifty-five".