20985298804 has 24 divisors (see below), whose sum is σ = 36887004000. Its totient is φ = 10446250080.

The previous prime is 20985298727. The next prime is 20985298823. The reversal of 20985298804 is 40889258902.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 908559 + ... + 931369.

It is an arithmetic number, because the mean of its divisors is an integer number (1536958500).

Almost surely, 2^20985298804 is an apocalyptic number.

It is an amenable number.

20985298804 is a deficient number, since it is larger than the sum of its proper divisors (15901705196).

20985298804 is a wasteful number, since it uses less digits than its factorization.

20985298804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23823 (or 23821 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 55.

The spelling of 20985298804 in words is "twenty billion, nine hundred eighty-five million, two hundred ninety-eight thousand, eight hundred four".