20775107 has 4 divisors (see below), whose sum is σ = 21491520. Its totient is φ = 20058696.

The previous prime is 20775103. The next prime is 20775121. The reversal of 20775107 is 70157702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20775107 - 2² = 20775103 is a prime.

It is a super-2 number, since 2×20775107² = 863210141722898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 716383 = 20775107 / (2 + 0 + 7 + 7 + 5 + 1 + 0 + 7).

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 20775107.

It is not an unprimeable number, because it can be changed into a prime (20775103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358163 + ... + 358220.

It is an arithmetic number, because the mean of its divisors is an integer number (5372880).

Almost surely, 2^20775107 is an apocalyptic number.

20775107 is a deficient number, since it is larger than the sum of its proper divisors (716413).

20775107 is an equidigital number, since it uses as much as digits as its factorization.

20775107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716412.

The product of its (nonzero) digits is 3430, while the sum is 29.

The square root of 20775107 is about 4557.9718077233. The cubic root of 20775107 is about 274.9040193973.

The spelling of 20775107 in words is "twenty million, seven hundred seventy-five thousand, one hundred seven".