18288883097 has 4 divisors (see below), whose sum is σ = 18356871780. Its totient is φ = 18220894416.

The previous prime is 18288883091. The next prime is 18288883111. The reversal of 18288883097 is 79038888281.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6130733401 + 12158149696 = 78299^2 + 110264^2 .

It is a cyclic number.

It is not a de Polignac number, because 18288883097 - 2⁸ = 18288882841 is a prime.

It is a super-2 number, since 2×18288883097² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18288883091) 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, 33993938 + ... + 33994475.

It is an arithmetic number, because the mean of its divisors is an integer number (4589217945).

Almost surely, 2^18288883097 is an apocalyptic number.

It is an amenable number.

18288883097 is a deficient number, since it is larger than the sum of its proper divisors (67988683).

18288883097 is an equidigital number, since it uses as much as digits as its factorization.

18288883097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67988682.

The product of its (nonzero) digits is 12386304, while the sum is 62.

The spelling of 18288883097 in words is "eighteen billion, two hundred eighty-eight million, eight hundred eighty-three thousand, ninety-seven".