18028461847 has 16 divisors (see below), whose sum is σ = 20707142400. Its totient is φ = 15523453440.

The previous prime is 18028461839. The next prime is 18028461851. The reversal of 18028461847 is 74816482081.

It is not a de Polignac number, because 18028461847 - 2³ = 18028461839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18028461847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18028461047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1500279 + ... + 1512247.

It is an arithmetic number, because the mean of its divisors is an integer number (1294196400).

Almost surely, 2^18028461847 is an apocalyptic number.

18028461847 is a deficient number, since it is larger than the sum of its proper divisors (2678680553).

18028461847 is a wasteful number, since it uses less digits than its factorization.

18028461847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19206.

The product of its (nonzero) digits is 688128, while the sum is 49.

The spelling of 18028461847 in words is "eighteen billion, twenty-eight million, four hundred sixty-one thousand, eight hundred forty-seven".