20285817446 has 8 divisors (see below), whose sum is σ = 30538578000. Its totient is φ = 10106291448.

The previous prime is 20285817427. The next prime is 20285817451. The reversal of 20285817446 is 64471858202.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20285817446.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18307946 + ... + 18309053.

It is an arithmetic number, because the mean of its divisors is an integer number (3817322250).

Almost surely, 2^20285817446 is an apocalyptic number.

20285817446 is a deficient number, since it is larger than the sum of its proper divisors (10252760554).

20285817446 is a wasteful number, since it uses less digits than its factorization.

20285817446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36617278.

The product of its (nonzero) digits is 860160, while the sum is 47.

The spelling of 20285817446 in words is "twenty billion, two hundred eighty-five million, eight hundred seventeen thousand, four hundred forty-six".