20768141 has 2 divisors, whose sum is σ = 20768142. Its totient is φ = 20768140.

The previous prime is 20768123. The next prime is 20768173. The reversal of 20768141 is 14186702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18748900 + 2019241 = 4330^2 + 1421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20768141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20762141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10384070 + 10384071.

It is an arithmetic number, because the mean of its divisors is an integer number (10384071).

Almost surely, 2^20768141 is an apocalyptic number.

It is an amenable number.

20768141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20768141 is an equidigital number, since it uses as much as digits as its factorization.

20768141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 20768141 is about 4557.2075879863. The cubic root of 20768141 is about 274.8732903863.

The spelling of 20768141 in words is "twenty million, seven hundred sixty-eight thousand, one hundred forty-one".