20550495 has 32 divisors (see below), whose sum is σ = 39559680. Its totient is φ = 8899200.

The previous prime is 20550493. The next prime is 20550521. The reversal of 20550495 is 59405502.

It is a happy number.

It is not a de Polignac number, because 20550495 - 2¹ = 20550493 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3156 + ... + 7145.

It is an arithmetic number, because the mean of its divisors is an integer number (1236240).

Almost surely, 2^20550495 is an apocalyptic number.

20550495 is a deficient number, since it is larger than the sum of its proper divisors (19009185).

20550495 is a wasteful number, since it uses less digits than its factorization.

20550495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10335.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 20550495 is about 4533.2653793927. The cubic root of 20550495 is about 273.9097106028.

Adding to 20550495 its reverse (59405502), we get a palindrome (79955997).

The spelling of 20550495 in words is "twenty million, five hundred fifty thousand, four hundred ninety-five".