20485256384 has 28 divisors (see below), whose sum is σ = 40655248128. Its totient is φ = 10241414400.

The previous prime is 20485256369. The next prime is 20485256447. The reversal of 20485256384 is 48365258402.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 798314 + ... + 823574.

Almost surely, 2^20485256384 is an apocalyptic number.

It is an amenable number.

20485256384 is a deficient number, since it is larger than the sum of its proper divisors (20169991744).

20485256384 is a wasteful number, since it uses less digits than its factorization.

20485256384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37944 (or 37934 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 47.

The spelling of 20485256384 in words is "twenty billion, four hundred eighty-five million, two hundred fifty-six thousand, three hundred eighty-four".