18812097 has 12 divisors (see below), whose sum is σ = 28110420. Its totient is φ = 12108768.

The previous prime is 18812093. The next prime is 18812117. The reversal of 18812097 is 79021881.

It can be written as a sum of positive squares in 2 ways, for example, as 4704561 + 14107536 = 2169^2 + 3756^2 .

It is not a de Polignac number, because 18812097 - 2² = 18812093 is a prime.

It is a super-3 number, since 3×18812097³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18812093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35778 + ... + 36299.

It is an arithmetic number, because the mean of its divisors is an integer number (2342535).

Almost surely, 2^18812097 is an apocalyptic number.

It is an amenable number.

18812097 is a deficient number, since it is larger than the sum of its proper divisors (9298323).

18812097 is a wasteful number, since it uses less digits than its factorization.

18812097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72112 (or 72109 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 18812097 is about 4337.2914359079. The cubic root of 18812097 is about 265.9575987213.

The spelling of 18812097 in words is "eighteen million, eight hundred twelve thousand, ninety-seven".