18941012 has 6 divisors (see below), whose sum is σ = 33146778. Its totient is φ = 9470504.

The previous prime is 18941011. The next prime is 18941017. The reversal of 18941012 is 21014981.

It can be written as a sum of positive squares in only one way, i.e., 18696976 + 244036 = 4324^2 + 494^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18941011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2367623 + ... + 2367630.

It is an arithmetic number, because the mean of its divisors is an integer number (5524463).

Almost surely, 2^18941012 is an apocalyptic number.

It is an amenable number.

18941012 is a deficient number, since it is larger than the sum of its proper divisors (14205766).

18941012 is a wasteful number, since it uses less digits than its factorization.

18941012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4735257 (or 4735255 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 18941012 is about 4352.1272959324. The cubic root of 18941012 is about 266.5637317994.

Adding to 18941012 its reverse (21014981), we get a palindrome (39955993).

The spelling of 18941012 in words is "eighteen million, nine hundred forty-one thousand, twelve".