20775207 has 8 divisors (see below), whose sum is σ = 29329776. Its totient is φ = 13035392.

The previous prime is 20775199. The next prime is 20775211. The reversal of 20775207 is 70257702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20775207 - 2³ = 20775199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20775217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203628 + ... + 203729.

It is an arithmetic number, because the mean of its divisors is an integer number (3666222).

Almost surely, 2^20775207 is an apocalyptic number.

20775207 is a deficient number, since it is larger than the sum of its proper divisors (8554569).

20775207 is a wasteful number, since it uses less digits than its factorization.

20775207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407377.

The product of its (nonzero) digits is 6860, while the sum is 30.

The square root of 20775207 is about 4557.9827775015. The cubic root of 20775207 is about 274.9044604758.

The spelling of 20775207 in words is "twenty million, seven hundred seventy-five thousand, two hundred seven".