18554963 has 8 divisors (see below), whose sum is σ = 22321920. Its totient is φ = 15067080.

The previous prime is 18554947. The next prime is 18554999. The reversal of 18554963 is 36945581.

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

It is not a de Polignac number, because 18554963 - 2⁴ = 18554947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18554963.

It is not an unprimeable number, because it can be changed into a prime (18554903) 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, 69623 + ... + 69888.

It is an arithmetic number, because the mean of its divisors is an integer number (2790240).

Almost surely, 2^18554963 is an apocalyptic number.

18554963 is a deficient number, since it is larger than the sum of its proper divisors (3766957).

18554963 is a wasteful number, since it uses less digits than its factorization.

18554963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139537.

The product of its digits is 129600, while the sum is 41.

The square root of 18554963 is about 4307.5472139026. The cubic root of 18554963 is about 264.7402842909.

The spelling of 18554963 in words is "eighteen million, five hundred fifty-four thousand, nine hundred sixty-three".