20767963 has 2 divisors, whose sum is σ = 20767964. Its totient is φ = 20767962.

The previous prime is 20767939. The next prime is 20768009. The reversal of 20767963 is 36976702.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20767963 is a prime.

It is not a weakly prime, because it can be changed into another prime (20767063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10383981 + 10383982.

It is an arithmetic number, because the mean of its divisors is an integer number (10383982).

Almost surely, 2^20767963 is an apocalyptic number.

20767963 is a deficient number, since it is larger than the sum of its proper divisors (1).

20767963 is an equidigital number, since it uses as much as digits as its factorization.

20767963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 40.

The square root of 20767963 is about 4557.1880584413. The cubic root of 20767963 is about 274.8725050875.

The spelling of 20767963 in words is "twenty million, seven hundred sixty-seven thousand, nine hundred sixty-three".