20675207 has 6 divisors (see below), whose sum is σ = 24050808. Its totient is φ = 17721564.

The previous prime is 20675203. The next prime is 20675227. The reversal of 20675207 is 70257602.

It is a happy number.

It is not a de Polignac number, because 20675207 - 2² = 20675203 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 20675207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210923 + ... + 211020.

It is an arithmetic number, because the mean of its divisors is an integer number (4008468).

Almost surely, 2^20675207 is an apocalyptic number.

20675207 is a deficient number, since it is larger than the sum of its proper divisors (3375601).

20675207 is an equidigital number, since it uses as much as digits as its factorization.

20675207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421957 (or 421950 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 20675207 is about 4546.9997800748. Note that the first 3 decimals coincide. The cubic root of 20675207 is about 274.4626731062.

The spelling of 20675207 in words is "twenty million, six hundred seventy-five thousand, two hundred seven".