18469417647 has 8 divisors (see below), whose sum is σ = 25921989760. Its totient is φ = 11664895320.

The previous prime is 18469417619. The next prime is 18469417649. The reversal of 18469417647 is 74671496481.

It is a happy number.

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

It is not a de Polignac number, because 18469417647 - 2¹² = 18469413551 is a prime.

It is a super-2 number, since 2×18469417647² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 324024871 = 18469417647 / (1 + 8 + 4 + 6 + 9 + 4 + 1 + 7 + 6 + 4 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18469417649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162012379 + ... + 162012492.

It is an arithmetic number, because the mean of its divisors is an integer number (3240248720).

Almost surely, 2^18469417647 is an apocalyptic number.

18469417647 is a deficient number, since it is larger than the sum of its proper divisors (7452572113).

18469417647 is a wasteful number, since it uses less digits than its factorization.

18469417647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324024893.

The product of its digits is 8128512, while the sum is 57.

The spelling of 18469417647 in words is "eighteen billion, four hundred sixty-nine million, four hundred seventeen thousand, six hundred forty-seven".