20000504064 has 72 divisors (see below), whose sum is σ = 53270826112. Its totient is φ = 6661785600.

The previous prime is 20000504047. The next prime is 20000504089. The reversal of 20000504064 is 46040500002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20000504064.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1083714 + ... + 1102014.

Almost surely, 2^20000504064 is an apocalyptic number.

20000504064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20000504064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26635413056).

20000504064 is an abundant number, since it is smaller than the sum of its proper divisors (33270322048).

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

20000504064 is a wasteful number, since it uses less digits than its factorization.

20000504064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19743 (or 19729 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The spelling of 20000504064 in words is "twenty billion, five hundred four thousand, sixty-four".