18262280497 has 4 divisors (see below), whose sum is σ = 18278148096. Its totient is φ = 18246412900.

The previous prime is 18262280489. The next prime is 18262280503. The reversal of 18262280497 is 79408226281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79408226281 = 205651 ⋅386131.

It is a cyclic number.

It is not a de Polignac number, because 18262280497 - 2³ = 18262280489 is a prime.

It is a super-2 number, since 2×18262280497² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18262280497.

It is not an unprimeable number, because it can be changed into a prime (18262284497) 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, 7932073 + ... + 7934374.

It is an arithmetic number, because the mean of its divisors is an integer number (4569537024).

Almost surely, 2^18262280497 is an apocalyptic number.

It is an amenable number.

18262280497 is a deficient number, since it is larger than the sum of its proper divisors (15867599).

18262280497 is a wasteful number, since it uses less digits than its factorization.

18262280497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15867598.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 18262280497 in words is "eighteen billion, two hundred sixty-two million, two hundred eighty thousand, four hundred ninety-seven".