20985475874 has 8 divisors (see below), whose sum is σ = 34339869648. Its totient is φ = 9538852660.

The previous prime is 20985475873. The next prime is 20985475891. The reversal of 20985475874 is 47857458902.

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

It is not an unprimeable number, because it can be changed into a prime (20985475873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476942612 + ... + 476942655.

It is an arithmetic number, because the mean of its divisors is an integer number (4292483706).

Almost surely, 2^20985475874 is an apocalyptic number.

20985475874 is a deficient number, since it is larger than the sum of its proper divisors (13354393774).

20985475874 is a wasteful number, since it uses less digits than its factorization.

20985475874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953885280.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 20985475874 in words is "twenty billion, nine hundred eighty-five million, four hundred seventy-five thousand, eight hundred seventy-four".