20123044566 has 8 divisors (see below), whose sum is σ = 40246089144. Its totient is φ = 6707681520.

The previous prime is 20123044549. The next prime is 20123044577. The reversal of 20123044566 is 66544032102.

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

20123044566 is an admirable number.

It is a super-3 number, since 3×20123044566³ (a number of 32 digits) contains 333 as substring.

It is a congruent 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, 1676920375 + ... + 1676920386.

It is an arithmetic number, because the mean of its divisors is an integer number (5030761143).

Almost surely, 2^20123044566 is an apocalyptic number.

20123044566 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.

20123044566 is a wasteful number, since it uses less digits than its factorization.

20123044566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3353840766.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 20123044566 its reverse (66544032102), we get a palindrome (86667076668).

The spelling of 20123044566 in words is "twenty billion, one hundred twenty-three million, forty-four thousand, five hundred sixty-six".