18268281957 has 8 divisors (see below), whose sum is σ = 25790515776. Its totient is φ = 11462451392.

The previous prime is 18268281947. The next prime is 18268281959. The reversal of 18268281957 is 75918286281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18268281957 - 2⁸ = 18268281701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18268281897 and 18268281906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18268281959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179100753 + ... + 179100854.

It is an arithmetic number, because the mean of its divisors is an integer number (3223814472).

Almost surely, 2^18268281957 is an apocalyptic number.

18268281957 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18268281957 is a deficient number, since it is larger than the sum of its proper divisors (7522233819).

18268281957 is a wasteful number, since it uses less digits than its factorization.

18268281957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358201627.

The product of its digits is 3870720, while the sum is 57.

The spelling of 18268281957 in words is "eighteen billion, two hundred sixty-eight million, two hundred eighty-one thousand, nine hundred fifty-seven".