20630699 has 2 divisors, whose sum is σ = 20630700. Its totient is φ = 20630698.

The previous prime is 20630681. The next prime is 20630711. The reversal of 20630699 is 99603602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20630699 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20630999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10315349 + 10315350.

It is an arithmetic number, because the mean of its divisors is an integer number (10315350).

Almost surely, 2^20630699 is an apocalyptic number.

20630699 is a deficient number, since it is larger than the sum of its proper divisors (1).

20630699 is an equidigital number, since it uses as much as digits as its factorization.

20630699 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 20630699 is about 4542.1029270592. The cubic root of 20630699 is about 274.2655842147.

The spelling of 20630699 in words is "twenty million, six hundred thirty thousand, six hundred ninety-nine".