20380550 has 24 divisors (see below), whose sum is σ = 38448432. Its totient is φ = 8036000.

The previous prime is 20380543. The next prime is 20380561. The reversal of 20380550 is 5508302.

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, 680 + ... + 6420.

It is an arithmetic number, because the mean of its divisors is an integer number (1602018).

Almost surely, 2^20380550 is an apocalyptic number.

20380550 is a deficient number, since it is larger than the sum of its proper divisors (18067882).

20380550 is a wasteful number, since it uses less digits than its factorization.

20380550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5824 (or 5819 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 20380550 is about 4514.4822515987. The cubic root of 20380550 is about 273.1525756447.

Adding to 20380550 its reverse (5508302), we get a palindrome (25888852).

The spelling of 20380550 in words is "twenty million, three hundred eighty thousand, five hundred fifty".