18279217480 has 32 divisors (see below), whose sum is σ = 41161760640. Its totient is φ = 7305727680.

The previous prime is 18279217471. The next prime is 18279217499. The reversal of 18279217480 is 8471297281.

It is a super-2 number, since 2×18279217480² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136374 + ... + 234853.

It is an arithmetic number, because the mean of its divisors is an integer number (1286305020).

Almost surely, 2^18279217480 is an apocalyptic number.

18279217480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18279217480 is an abundant number, since it is smaller than the sum of its proper divisors (22882543160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18279217480 is a wasteful number, since it uses less digits than its factorization.

18279217480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372469 (or 372465 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 49.

The spelling of 18279217480 in words is "eighteen billion, two hundred seventy-nine million, two hundred seventeen thousand, four hundred eighty".