18122402 has 8 divisors (see below), whose sum is σ = 27243216. Its totient is φ = 9041332.

The previous prime is 18122399. The next prime is 18122431. The reversal of 18122402 is 20422181.

It is a happy number.

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, 8768 + ... + 10635.

It is an arithmetic number, because the mean of its divisors is an integer number (3405402).

Almost surely, 2^18122402 is an apocalyptic number.

18122402 is a deficient number, since it is larger than the sum of its proper divisors (9120814).

18122402 is a wasteful number, since it uses less digits than its factorization.

18122402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19872.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 18122402 is about 4257.0414609210. The cubic root of 18122402 is about 262.6668423847. Note that the first 3 decimals are identical.

Adding to 18122402 its reverse (20422181), we get a palindrome (38544583).

The spelling of 18122402 in words is "eighteen million, one hundred twenty-two thousand, four hundred two".