20930669 has 2 divisors, whose sum is σ = 20930670. Its totient is φ = 20930668.

The previous prime is 20930629. The next prime is 20930671. The reversal of 20930669 is 96603902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17556100 + 3374569 = 4190^2 + 1837^2 .

It is a cyclic number.

It is not a de Polignac number, because 20930669 - 2²⁴ = 4153453 is a prime.

It is a super-2 number, since 2×20930669² = 876185809575122, which contains 22 as substring.

Together with 20930671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20930629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10465334 + 10465335.

It is an arithmetic number, because the mean of its divisors is an integer number (10465335).

Almost surely, 2^20930669 is an apocalyptic number.

It is an amenable number.

20930669 is a deficient number, since it is larger than the sum of its proper divisors (1).

20930669 is an equidigital number, since it uses as much as digits as its factorization.

20930669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 20930669 is about 4575.0048087406. The cubic root of 20930669 is about 275.5884654794.

The spelling of 20930669 in words is "twenty million, nine hundred thirty thousand, six hundred sixty-nine".