18247289697 has 48 divisors (see below), whose sum is σ = 32453774080. Its totient is φ = 9620747136.

The previous prime is 18247289651. The next prime is 18247289743. The reversal of 18247289697 is 79698274281.

18247289697 is a `hidden beast` number, since 1 + 82 + 472 + 89 + 6 + 9 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (18247289651) and next prime (18247289743).

It is not a de Polignac number, because 18247289697 - 2⁶ = 18247289633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (18247289617) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3034668 + ... + 3040674.

Almost surely, 2^18247289697 is an apocalyptic number.

It is an amenable number.

18247289697 is a deficient number, since it is larger than the sum of its proper divisors (14206484383).

18247289697 is a wasteful number, since it uses less digits than its factorization.

18247289697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9742 (or 9739 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The spelling of 18247289697 in words is "eighteen billion, two hundred forty-seven million, two hundred eighty-nine thousand, six hundred ninety-seven".