18478013696 has 36 divisors (see below), whose sum is σ = 37037016324. Its totient is φ = 9200640000.

The previous prime is 18478013689. The next prime is 18478013737. The reversal of 18478013696 is 69631087481.

It can be written as a sum of positive squares in 2 ways, for example, as 7814560000 + 10663453696 = 88400^2 + 103264^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88055 + ... + 211446.

It is an arithmetic number, because the mean of its divisors is an integer number (1028806009).

Almost surely, 2^18478013696 is an apocalyptic number.

18478013696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18478013696 is an abundant number, since it is smaller than the sum of its proper divisors (18559002628).

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

18478013696 is an equidigital number, since it uses as much as digits as its factorization.

18478013696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299758 (or 299744 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 18478013696 in words is "eighteen billion, four hundred seventy-eight million, thirteen thousand, six hundred ninety-six".