20854159 has 2 divisors, whose sum is σ = 20854160. Its totient is φ = 20854158.

The previous prime is 20854147. The next prime is 20854201. The reversal of 20854159 is 95145802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20854159 - 2²¹ = 18757007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20854109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10427079 + 10427080.

It is an arithmetic number, because the mean of its divisors is an integer number (10427080).

Almost surely, 2^20854159 is an apocalyptic number.

20854159 is a deficient number, since it is larger than the sum of its proper divisors (1).

20854159 is an equidigital number, since it uses as much as digits as its factorization.

20854159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 20854159 is about 4566.6354135184. The cubic root of 20854159 is about 275.2522599889.

The spelling of 20854159 in words is "twenty million, eight hundred fifty-four thousand, one hundred fifty-nine".