18172469945 has 16 divisors (see below), whose sum is σ = 25169004288. Its totient is φ = 12337742400.

The previous prime is 18172469927. The next prime is 18172469963. The reversal of 18172469945 is 54996427181.

It is an interprime number because it is at equal distance from previous prime (18172469927) and next prime (18172469963).

It is not a de Polignac number, because 18172469945 - 2¹⁰ = 18172468921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2566829 + ... + 2573898.

It is an arithmetic number, because the mean of its divisors is an integer number (1573062768).

Almost surely, 2^18172469945 is an apocalyptic number.

It is an amenable number.

18172469945 is a deficient number, since it is larger than the sum of its proper divisors (6996534343).

18172469945 is a wasteful number, since it uses less digits than its factorization.

18172469945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5140840.

The product of its digits is 4354560, while the sum is 56.

The spelling of 18172469945 in words is "eighteen billion, one hundred seventy-two million, four hundred sixty-nine thousand, nine hundred forty-five".