20908275 has 24 divisors (see below), whose sum is σ = 35764080. Its totient is φ = 10765440.

The previous prime is 20908273. The next prime is 20908297. The reversal of 20908275 is 57280902.

It is not a de Polignac number, because 20908275 - 2¹ = 20908273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20908273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2632 + ... + 6981.

It is an arithmetic number, because the mean of its divisors is an integer number (1490170).

Almost surely, 2^20908275 is an apocalyptic number.

20908275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20908275 is a deficient number, since it is larger than the sum of its proper divisors (14855805).

20908275 is a wasteful number, since it uses less digits than its factorization.

20908275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9655 (or 9650 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 20908275 is about 4572.5567246345. The cubic root of 20908275 is about 275.4901451565.

The spelling of 20908275 in words is "twenty million, nine hundred eight thousand, two hundred seventy-five".