18419648965 has 8 divisors (see below), whose sum is σ = 22154628888. Its totient is φ = 14701685760.

The previous prime is 18419648953. The next prime is 18419648977. The reversal of 18419648965 is 56984691481.

It is an interprime number because it is at equal distance from previous prime (18419648953) and next prime (18419648977).

It can be written as a sum of positive squares in 4 ways, for example, as 936727236 + 17482921729 = 30606^2 + 132223^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18419648965 - 2¹⁹ = 18419124677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4251796 + ... + 4256125.

It is an arithmetic number, because the mean of its divisors is an integer number (2769328611).

Almost surely, 2^18419648965 is an apocalyptic number.

It is an amenable number.

18419648965 is a deficient number, since it is larger than the sum of its proper divisors (3734979923).

18419648965 is an equidigital number, since it uses as much as digits as its factorization.

18419648965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8508359.

The product of its digits is 14929920, while the sum is 61.

The spelling of 18419648965 in words is "eighteen billion, four hundred nineteen million, six hundred forty-eight thousand, nine hundred sixty-five".