18278271028 has 12 divisors (see below), whose sum is σ = 33377712480. Its totient is φ = 8741781752.

The previous prime is 18278271023. The next prime is 18278271031. The reversal of 18278271028 is 82017287281.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18278271023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99338338 + ... + 99338521.

It is an arithmetic number, because the mean of its divisors is an integer number (2781476040).

Almost surely, 2^18278271028 is an apocalyptic number.

It is an amenable number.

18278271028 is a deficient number, since it is larger than the sum of its proper divisors (15099441452).

18278271028 is a wasteful number, since it uses less digits than its factorization.

18278271028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198676886 (or 198676884 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 46.

The spelling of 18278271028 in words is "eighteen billion, two hundred seventy-eight million, two hundred seventy-one thousand, twenty-eight".