18440470785 has 48 divisors (see below), whose sum is σ = 32451531840. Its totient is φ = 8935132800.

The previous prime is 18440470781. The next prime is 18440470813. The reversal of 18440470785 is 58707404481.

It is not a de Polignac number, because 18440470785 - 2² = 18440470781 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18440470781) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 4824175 + ... + 4827995.

It is an arithmetic number, because the mean of its divisors is an integer number (676073580).

Almost surely, 2^18440470785 is an apocalyptic number.

18440470785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18440470785 is a deficient number, since it is larger than the sum of its proper divisors (14011061055).

18440470785 is a wasteful number, since it uses less digits than its factorization.

18440470785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6510 (or 6499 counting only the distinct ones).

The product of its (nonzero) digits is 1003520, while the sum is 48.

The spelling of 18440470785 in words is "eighteen billion, four hundred forty million, four hundred seventy thousand, seven hundred eighty-five".