20105501325550 has 24 divisors (see below), whose sum is σ = 37430322114096. Its totient is φ = 8034869423040.

The previous prime is 20105501325523. The next prime is 20105501325577. The reversal of 20105501325550 is 5552310550102.

It is an interprime number because it is at equal distance from previous prime (20105501325523) and next prime (20105501325577).

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, 183222282 + ... + 183331981.

It is an arithmetic number, because the mean of its divisors is an integer number (1559596754754).

Almost surely, 2^{20105501325550} is an apocalyptic number.

20105501325550 is a deficient number, since it is larger than the sum of its proper divisors (17324820788546).

20105501325550 is a wasteful number, since it uses less digits than its factorization.

20105501325550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366555372 (or 366555367 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 34.

Adding to 20105501325550 its reverse (5552310550102), we get a palindrome (25657811875652).

The spelling of 20105501325550 in words is "twenty trillion, one hundred five billion, five hundred one million, three hundred twenty-five thousand, five hundred fifty".