18471529649 has 8 divisors (see below), whose sum is σ = 19689840000. Its totient is φ = 17277831792.

The previous prime is 18471529577. The next prime is 18471529697. The reversal of 18471529649 is 94692517481.

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

It is not a de Polignac number, because 18471529649 - 2¹⁶ = 18471464113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18471529594 and 18471529603.

It is not an unprimeable number, because it can be changed into a prime (18471529249) 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, 6151574 + ... + 6154575.

It is an arithmetic number, because the mean of its divisors is an integer number (2461230000).

Almost surely, 2^18471529649 is an apocalyptic number.

18471529649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18471529649 is a deficient number, since it is larger than the sum of its proper divisors (1218310351).

18471529649 is a wasteful number, since it uses less digits than its factorization.

18471529649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12306247.

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

The spelling of 18471529649 in words is "eighteen billion, four hundred seventy-one million, five hundred twenty-nine thousand, six hundred forty-nine".