20783275 has 12 divisors (see below), whose sum is σ = 26029584. Its totient is φ = 16460000.

The previous prime is 20783267. The next prime is 20783291. The reversal of 20783275 is 57238702.

It is not a de Polignac number, because 20783275 - 2³ = 20783267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20783275.

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, 1591 + ... + 6640.

It is an arithmetic number, because the mean of its divisors is an integer number (2169132).

Almost surely, 2^20783275 is an apocalyptic number.

20783275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20783275 is a deficient number, since it is larger than the sum of its proper divisors (5246309).

20783275 is a wasteful number, since it uses less digits than its factorization.

20783275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8342 (or 8337 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 20783275 is about 4558.8677322335. The cubic root of 20783275 is about 274.9400420248.

The spelling of 20783275 in words is "twenty million, seven hundred eighty-three thousand, two hundred seventy-five".