20651159 has 2 divisors, whose sum is σ = 20651160. Its totient is φ = 20651158.

The previous prime is 20651149. The next prime is 20651173. The reversal of 20651159 is 95115602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20651159 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20651149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10325579 + 10325580.

It is an arithmetic number, because the mean of its divisors is an integer number (10325580).

Almost surely, 2^20651159 is an apocalyptic number.

20651159 is a deficient number, since it is larger than the sum of its proper divisors (1).

20651159 is an equidigital number, since it uses as much as digits as its factorization.

20651159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 20651159 is about 4544.3546296476. The cubic root of 20651159 is about 274.3562196938.

The spelling of 20651159 in words is "twenty million, six hundred fifty-one thousand, one hundred fifty-nine".