20404036500550 has 24 divisors (see below), whose sum is σ = 37978635618000. Its totient is φ = 8155780680480.

The previous prime is 20404036500509. The next prime is 20404036500581. The reversal of 20404036500550 is 5500563040402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145777345 + ... + 145917244.

It is an arithmetic number, because the mean of its divisors is an integer number (1582443150750).

Almost surely, 2^{20404036500550} is an apocalyptic number.

20404036500550 is a deficient number, since it is larger than the sum of its proper divisors (17574599117450).

20404036500550 is a wasteful number, since it uses less digits than its factorization.

20404036500550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291696000 (or 291695995 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 20404036500550 its reverse (5500563040402), we get a palindrome (25904599540952).

The spelling of 20404036500550 in words is "twenty trillion, four hundred four billion, thirty-six million, five hundred thousand, five hundred fifty".