18725215776 has 96 divisors (see below), whose sum is σ = 49922308800. Its totient is φ = 6144844800.

The previous prime is 18725215741. The next prime is 18725215783. The reversal of 18725215776 is 67751252781.

It is a tau number, because it is divible by the number of its divisors (96).

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 15 ways as a sum of consecutive naturals, for example, 1730190 + ... + 1740978.

It is an arithmetic number, because the mean of its divisors is an integer number (520024050).

Almost surely, 2^18725215776 is an apocalyptic number.

18725215776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18725215776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24961154400).

18725215776 is an abundant number, since it is smaller than the sum of its proper divisors (31197093024).

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

18725215776 is a wasteful number, since it uses less digits than its factorization.

18725215776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11082 (or 11074 counting only the distinct ones).

The product of its digits is 1646400, while the sum is 51.

The spelling of 18725215776 in words is "eighteen billion, seven hundred twenty-five million, two hundred fifteen thousand, seven hundred seventy-six".