20650507 has 2 divisors, whose sum is σ = 20650508. Its totient is φ = 20650506.

The previous prime is 20650501. The next prime is 20650519. The reversal of 20650507 is 70505602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20650507 - 2³ = 20650499 is a prime.

It is not a weakly prime, because it can be changed into another prime (20650501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10325253 + 10325254.

It is an arithmetic number, because the mean of its divisors is an integer number (10325254).

Almost surely, 2^20650507 is an apocalyptic number.

20650507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20650507 is an equidigital number, since it uses as much as digits as its factorization.

20650507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 20650507 is about 4544.2828917223. The cubic root of 20650507 is about 274.3533323314.

The spelling of 20650507 in words is "twenty million, six hundred fifty thousand, five hundred seven".