18851012 has 12 divisors (see below), whose sum is σ = 33056016. Its totient is φ = 9406440.

The previous prime is 18850973. The next prime is 18851017. The reversal of 18851012 is 21015881.

It is not an unprimeable number, because it can be changed into a prime (18851017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2414 + ... + 6597.

It is an arithmetic number, because the mean of its divisors is an integer number (2754668).

Almost surely, 2^18851012 is an apocalyptic number.

It is an amenable number.

18851012 is a deficient number, since it is larger than the sum of its proper divisors (14205004).

18851012 is a wasteful number, since it uses less digits than its factorization.

18851012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9538 (or 9536 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 18851012 is about 4341.7752129745. The cubic root of 18851012 is about 266.1408604385.

Adding to 18851012 its reverse (21015881), we get a palindrome (39866893).

The spelling of 18851012 in words is "eighteen million, eight hundred fifty-one thousand, twelve".