20113963 has 2 divisors, whose sum is σ = 20113964. Its totient is φ = 20113962.

The previous prime is 20113949. The next prime is 20113993. The reversal of 20113963 is 36931102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20113963 - 2¹⁷ = 19982891 is a prime.

It is equal to p_1277413 and since 20113963 and 1277413 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20113993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056981 + 10056982.

It is an arithmetic number, because the mean of its divisors is an integer number (10056982).

Almost surely, 2^20113963 is an apocalyptic number.

20113963 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113963 is an equidigital number, since it uses as much as digits as its factorization.

20113963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 20113963 is about 4484.8593066004. The cubic root of 20113963 is about 271.9563574371.

The spelling of 20113963 in words is "twenty million, one hundred thirteen thousand, nine hundred sixty-three".