20983275 has 36 divisors (see below), whose sum is σ = 37865880. Its totient is φ = 11107200.

The previous prime is 20983273. The next prime is 20983289. The reversal of 20983275 is 57238902.

It is a happy number.

It is not a de Polignac number, because 20983275 - 2¹ = 20983273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20983271) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 40015 + ... + 40535.

It is an arithmetic number, because the mean of its divisors is an integer number (1051830).

Almost surely, 2^20983275 is an apocalyptic number.

20983275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20983275 is a deficient number, since it is larger than the sum of its proper divisors (16882605).

20983275 is a wasteful number, since it uses less digits than its factorization.

20983275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 20983275 is about 4580.7504843639. The cubic root of 20983275 is about 275.8191553173.

The spelling of 20983275 in words is "twenty million, nine hundred eighty-three thousand, two hundred seventy-five".