18886963 has 2 divisors, whose sum is σ = 18886964. Its totient is φ = 18886962.

The previous prime is 18886951. The next prime is 18887009. The reversal of 18886963 is 36968881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18886963 - 2¹³ = 18878771 is a prime.

It is not a weakly prime, because it can be changed into another prime (18886913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9443481 + 9443482.

It is an arithmetic number, because the mean of its divisors is an integer number (9443482).

Almost surely, 2^18886963 is an apocalyptic number.

18886963 is a deficient number, since it is larger than the sum of its proper divisors (1).

18886963 is an equidigital number, since it uses as much as digits as its factorization.

18886963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 49.

The square root of 18886963 is about 4345.9133677514. The cubic root of 18886963 is about 266.3099398505.

The spelling of 18886963 in words is "eighteen million, eight hundred eighty-six thousand, nine hundred sixty-three".