20168955 has 12 divisors (see below), whose sum is σ = 34959600. Its totient is φ = 10756752.

The previous prime is 20168947. The next prime is 20168957. The reversal of 20168955 is 55986102.

It is a happy number.

It is not a de Polignac number, because 20168955 - 2³ = 20168947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20168957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224055 + ... + 224144.

It is an arithmetic number, because the mean of its divisors is an integer number (2913300).

Almost surely, 2^20168955 is an apocalyptic number.

20168955 is a deficient number, since it is larger than the sum of its proper divisors (14790645).

20168955 is a wasteful number, since it uses less digits than its factorization.

20168955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448210 (or 448207 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 20168955 is about 4490.9859719220. The cubic root of 20168955 is about 272.2039767184.

The spelling of 20168955 in words is "twenty million, one hundred sixty-eight thousand, nine hundred fifty-five".