20116550 has 12 divisors (see below), whose sum is σ = 37416876. Its totient is φ = 8046600.

The previous prime is 20116543. The next prime is 20116619. The reversal of 20116550 is 5561102.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201116 + ... + 201215.

It is an arithmetic number, because the mean of its divisors is an integer number (3118073).

Almost surely, 2^20116550 is an apocalyptic number.

20116550 is a deficient number, since it is larger than the sum of its proper divisors (17300326).

20116550 is a wasteful number, since it uses less digits than its factorization.

20116550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402343 (or 402338 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 20116550 is about 4485.1477121718. The cubic root of 20116550 is about 271.9680163517.

Adding to 20116550 its reverse (5561102), we get a palindrome (25677652).

The spelling of 20116550 in words is "twenty million, one hundred sixteen thousand, five hundred fifty".