20155423206 has 8 divisors (see below), whose sum is σ = 40310846424. Its totient is φ = 6718474400.

The previous prime is 20155423157. The next prime is 20155423207. The reversal of 20155423206 is 60232455102.

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

20155423206 is an admirable number.

It is a super-2 number, since 2×20155423206² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155423207) 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 in 3 ways as a sum of consecutive naturals, for example, 1679618595 + ... + 1679618606.

It is an arithmetic number, because the mean of its divisors is an integer number (5038855803).

Almost surely, 2^20155423206 is an apocalyptic number.

20155423206 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20155423206 is a wasteful number, since it uses less digits than its factorization.

20155423206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359237206.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 20155423206 its reverse (60232455102), we get a palindrome (80387878308).

The spelling of 20155423206 in words is "twenty billion, one hundred fifty-five million, four hundred twenty-three thousand, two hundred six".