20930159 has 2 divisors, whose sum is σ = 20930160. Its totient is φ = 20930158.

The previous prime is 20930113. The next prime is 20930167. The reversal of 20930159 is 95103902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20930159 - 2¹² = 20926063 is a prime.

It is a Sophie Germain prime.

It is equal to p_1325819 and since 20930159 and 1325819 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20932159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10465079 + 10465080.

It is an arithmetic number, because the mean of its divisors is an integer number (10465080).

Almost surely, 2^20930159 is an apocalyptic number.

20930159 is a deficient number, since it is larger than the sum of its proper divisors (1).

20930159 is an equidigital number, since it uses as much as digits as its factorization.

20930159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 20930159 is about 4574.9490707548. The cubic root of 20930159 is about 275.5862271171.

The spelling of 20930159 in words is "twenty million, nine hundred thirty thousand, one hundred fifty-nine".