20123724403866 has 8 divisors (see below), whose sum is σ = 40247448807744. Its totient is φ = 6707908134620.

The previous prime is 20123724403847. The next prime is 20123724403891. The reversal of 20123724403866 is 66830442732102.

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

20123724403866 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1676977033650 + ... + 1676977033661.

It is an arithmetic number, because the mean of its divisors is an integer number (5030931100968).

Almost surely, 2^{20123724403866} is an apocalyptic number.

20123724403866 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.

20123724403866 is a wasteful number, since it uses less digits than its factorization.

20123724403866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3353954067316.

The product of its (nonzero) digits is 2322432, while the sum is 48.

The spelling of 20123724403866 in words is "twenty trillion, one hundred twenty-three billion, seven hundred twenty-four million, four hundred three thousand, eight hundred sixty-six".