18229563 has 16 divisors (see below), whose sum is σ = 29462400. Its totient is φ = 11048040.

The previous prime is 18229537. The next prime is 18229573. The reversal of 18229563 is 36592281.

It is not a de Polignac number, because 18229563 - 2¹⁷ = 18098491 is a prime.

It is a super-3 number, since 3×18229563³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18229513) 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, 30393 + ... + 30986.

It is an arithmetic number, because the mean of its divisors is an integer number (1841400).

Almost surely, 2^18229563 is an apocalyptic number.

18229563 is a deficient number, since it is larger than the sum of its proper divisors (11232837).

18229563 is a wasteful number, since it uses less digits than its factorization.

18229563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61399 (or 61393 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 18229563 is about 4269.6092327050. The cubic root of 18229563 is about 263.1835572286.

The spelling of 18229563 in words is "eighteen million, two hundred twenty-nine thousand, five hundred sixty-three".