18820963 has 8 divisors (see below), whose sum is σ = 22641920. Its totient is φ = 15283080.

The previous prime is 18820961. The next prime is 18820973. The reversal of 18820963 is 36902881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18820963 - 2¹ = 18820961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18820961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70623 + ... + 70888.

It is an arithmetic number, because the mean of its divisors is an integer number (2830240).

Almost surely, 2^18820963 is an apocalyptic number.

18820963 is a deficient number, since it is larger than the sum of its proper divisors (3820957).

18820963 is a wasteful number, since it uses less digits than its factorization.

18820963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141537.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 18820963 is about 4338.3133819493. The cubic root of 18820963 is about 265.9993734321. Note that the first 3 decimals are identical.

The spelling of 18820963 in words is "eighteen million, eight hundred twenty thousand, nine hundred sixty-three".