20555201234 has 4 divisors (see below), whose sum is σ = 30832801854. Its totient is φ = 10277600616.

The previous prime is 20555201209. The next prime is 20555201237. The reversal of 20555201234 is 43210255502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20176782025 + 378419209 = 142045^2 + 19453^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20555201197 and 20555201206.

It is not an unprimeable number, because it can be changed into a prime (20555201237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5138800307 + ... + 5138800310.

Almost surely, 2^20555201234 is an apocalyptic number.

20555201234 is a deficient number, since it is larger than the sum of its proper divisors (10277600620).

20555201234 is a wasteful number, since it uses less digits than its factorization.

20555201234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10277600619.

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 20555201234 its reverse (43210255502), we get a palindrome (63765456736).

The spelling of 20555201234 in words is "twenty billion, five hundred fifty-five million, two hundred one thousand, two hundred thirty-four".