20196623 has 2 divisors, whose sum is σ = 20196624. Its totient is φ = 20196622.

The previous prime is 20196619. The next prime is 20196647. The reversal of 20196623 is 32669102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20196623 - 2² = 20196619 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20196653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10098311 + 10098312.

It is an arithmetic number, because the mean of its divisors is an integer number (10098312).

Almost surely, 2^20196623 is an apocalyptic number.

20196623 is a deficient number, since it is larger than the sum of its proper divisors (1).

20196623 is an equidigital number, since it uses as much as digits as its factorization.

20196623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20196623 is about 4494.0653088267. The cubic root of 20196623 is about 272.3283906736.

The spelling of 20196623 in words is "twenty million, one hundred ninety-six thousand, six hundred twenty-three".