20624159 has 2 divisors, whose sum is σ = 20624160. Its totient is φ = 20624158.

The previous prime is 20624147. The next prime is 20624183. The reversal of 20624159 is 95142602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20624159 - 2⁸ = 20623903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20624119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10312079 + 10312080.

It is an arithmetic number, because the mean of its divisors is an integer number (10312080).

Almost surely, 2^20624159 is an apocalyptic number.

20624159 is a deficient number, since it is larger than the sum of its proper divisors (1).

20624159 is an equidigital number, since it uses as much as digits as its factorization.

20624159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 20624159 is about 4541.3829391497. The cubic root of 20624159 is about 274.2366001186.

The spelling of 20624159 in words is "twenty million, six hundred twenty-four thousand, one hundred fifty-nine".