19812963 has 16 divisors (see below), whose sum is σ = 27417600. Its totient is φ = 12717120.

The previous prime is 19812943. The next prime is 19812971. The reversal of 19812963 is 36921891.

It is not a de Polignac number, because 19812963 - 2⁹ = 19812451 is a prime.

It is a super-3 number, since 3×19812963³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (19812943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8698 + ... + 10736.

It is an arithmetic number, because the mean of its divisors is an integer number (1713600).

Almost surely, 2^19812963 is an apocalyptic number.

19812963 is a deficient number, since it is larger than the sum of its proper divisors (7604637).

19812963 is a wasteful number, since it uses less digits than its factorization.

19812963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162.

The product of its digits is 23328, while the sum is 39.

The square root of 19812963 is about 4451.1754627289. The cubic root of 19812963 is about 270.5929492664.

The spelling of 19812963 in words is "nineteen million, eight hundred twelve thousand, nine hundred sixty-three".