20159929 has 2 divisors, whose sum is σ = 20159930. Its totient is φ = 20159928.

The previous prime is 20159917. The next prime is 20159933. The reversal of 20159929 is 92995102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19053225 + 1106704 = 4365^2 + 1052^2 .

It is a cyclic number.

It is not a de Polignac number, because 20159929 - 2⁵ = 20159897 is a prime.

It is not a weakly prime, because it can be changed into another prime (20159939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10079964 + 10079965.

It is an arithmetic number, because the mean of its divisors is an integer number (10079965).

Almost surely, 2^20159929 is an apocalyptic number.

It is an amenable number.

20159929 is a deficient number, since it is larger than the sum of its proper divisors (1).

20159929 is an equidigital number, since it uses as much as digits as its factorization.

20159929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 20159929 is about 4489.9809576434. The cubic root of 20159929 is about 272.1633651334.

The spelling of 20159929 in words is "twenty million, one hundred fifty-nine thousand, nine hundred twenty-nine".