20003561557146 has 48 divisors (see below), whose sum is σ = 45235608425280. Its totient is φ = 6376513651200.

The previous prime is 20003561557139. The next prime is 20003561557201. The reversal of 20003561557146 is 64175516530002.

20003561557146 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 3 + 56 + 1 + 557 + 1 + 46 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3585031 + ... + 7270458.

It is an arithmetic number, because the mean of its divisors is an integer number (942408508860).

Almost surely, 2^{20003561557146} is an apocalyptic number.

20003561557146 is an abundant number, since it is smaller than the sum of its proper divisors (25232046868134).

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

20003561557146 is a wasteful number, since it uses less digits than its factorization.

20003561557146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10859971 (or 10859968 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 20003561557146 in words is "twenty trillion, three billion, five hundred sixty-one million, five hundred fifty-seven thousand, one hundred forty-six".