18227402 has 8 divisors (see below), whose sum is σ = 27382212. Its totient is φ = 9100000.

The previous prime is 18227371. The next prime is 18227437. The reversal of 18227402 is 20472281.

It can be written as a sum of positive squares in 2 ways, for example, as 17901361 + 326041 = 4231^2 + 571^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5099 + ... + 7902.

Almost surely, 2^18227402 is an apocalyptic number.

18227402 is a deficient number, since it is larger than the sum of its proper divisors (9154810).

18227402 is a wasteful number, since it uses less digits than its factorization.

18227402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13704.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 18227402 is about 4269.3561575488. The cubic root of 18227402 is about 263.1731572327.

Adding to 18227402 its reverse (20472281), we get a palindrome (38699683).

The spelling of 18227402 in words is "eighteen million, two hundred twenty-seven thousand, four hundred two".