18428949247 has 6 divisors (see below), whose sum is σ = 18889400624. Its totient is φ = 17979461040.

The previous prime is 18428949197. The next prime is 18428949251. The reversal of 18428949247 is 74294982481.

It is a de Polignac number, because none of the positive numbers 2^k-18428949247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18428949191 and 18428949200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18428949647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5479863 + ... + 5483224.

Almost surely, 2^18428949247 is an apocalyptic number.

18428949247 is a deficient number, since it is larger than the sum of its proper divisors (460451377).

18428949247 is an equidigital number, since it uses as much as digits as its factorization.

18428949247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10963169 (or 10963128 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 58.

The spelling of 18428949247 in words is "eighteen billion, four hundred twenty-eight million, nine hundred forty-nine thousand, two hundred forty-seven".