20004357137556 has 96 divisors (see below), whose sum is σ = 52518478602240. Its totient is φ = 5874206992000.

The previous prime is 20004357137503. The next prime is 20004357137579. The reversal of 20004357137556 is 65573175340002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15335916 + ... + 16589123.

It is an arithmetic number, because the mean of its divisors is an integer number (547067485440).

Almost surely, 2^{20004357137556} is an apocalyptic number.

It is an amenable number.

20004357137556 is an abundant number, since it is smaller than the sum of its proper divisors (32514121464684).

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

20004357137556 is a wasteful number, since it uses less digits than its factorization.

20004357137556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31925205 (or 31925203 counting only the distinct ones).

The product of its (nonzero) digits is 2646000, while the sum is 48.

The spelling of 20004357137556 in words is "twenty trillion, four billion, three hundred fifty-seven million, one hundred thirty-seven thousand, five hundred fifty-six".