18279448451 has 8 divisors (see below), whose sum is σ = 20028298800. Its totient is φ = 16545111840.

The previous prime is 18279448433. The next prime is 18279448457. The reversal of 18279448451 is 15484497281.

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 18279448451 - 2²² = 18275254147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18279448393 and 18279448402.

It is not an unprimeable number, because it can be changed into a prime (18279448457) 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, 3625796 + ... + 3630833.

It is an arithmetic number, because the mean of its divisors is an integer number (2503537350).

Almost surely, 2^18279448451 is an apocalyptic number.

18279448451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18279448451 is a deficient number, since it is larger than the sum of its proper divisors (1748850349).

18279448451 is a wasteful number, since it uses less digits than its factorization.

18279448451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7256869.

The product of its digits is 2580480, while the sum is 53.

The spelling of 18279448451 in words is "eighteen billion, two hundred seventy-nine million, four hundred forty-eight thousand, four hundred fifty-one".