18229546 has 4 divisors (see below), whose sum is σ = 27344322. Its totient is φ = 9114772.

The previous prime is 18229537. The next prime is 18229573. The reversal of 18229546 is 64592281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64592281 = 13 ⋅4968637.

It can be written as a sum of positive squares in only one way, i.e., 17732521 + 497025 = 4211^2 + 705^2 .

It is a super-2 number, since 2×18229546² = 664632694732232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4557385 + ... + 4557388.

Almost surely, 2^18229546 is an apocalyptic number.

18229546 is a deficient number, since it is larger than the sum of its proper divisors (9114776).

18229546 is an equidigital number, since it uses as much as digits as its factorization.

18229546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9114775.

The product of its digits is 34560, while the sum is 37.

The square root of 18229546 is about 4269.6072418901. The cubic root of 18229546 is about 263.1834754179.

The spelling of 18229546 in words is "eighteen million, two hundred twenty-nine thousand, five hundred forty-six".