18702012 has 24 divisors (see below), whose sum is σ = 49872256. Its totient is φ = 5343408.

The previous prime is 18702001. The next prime is 18702029. The reversal of 18702012 is 21020781.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 18702012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111238 + ... + 111405.

Almost surely, 2^18702012 is an apocalyptic number.

18702012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18702012 is an abundant number, since it is smaller than the sum of its proper divisors (31170244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18702012 is a wasteful number, since it uses less digits than its factorization.

18702012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222657 (or 222655 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 18702012 is about 4324.5822919676. The cubic root of 18702012 is about 265.4378048462.

Adding to 18702012 its reverse (21020781), we get a palindrome (39722793).

The spelling of 18702012 in words is "eighteen million, seven hundred two thousand, twelve".