20003336256 has 112 divisors (see below), whose sum is σ = 55375478784. Its totient is φ = 6360685056.

The previous prime is 20003336239. The next prime is 20003336299. The reversal of 20003336256 is 65263330002.

It is a super-2 number, since 2×20003336256² (a number of 21 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 1685415 + ... + 1697241.

Almost surely, 2^20003336256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20003336256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27687739392).

20003336256 is an abundant number, since it is smaller than the sum of its proper divisors (35372142528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20003336256 is a wasteful number, since it uses less digits than its factorization.

20003336256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12248 (or 12238 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 30.

Adding to 20003336256 its reverse (65263330002), we get a palindrome (85266666258).

The spelling of 20003336256 in words is "twenty billion, three million, three hundred thirty-six thousand, two hundred fifty-six".