18894278052 has 120 divisors (see below), whose sum is σ = 54325197696. Its totient is φ = 5689870272.

The previous prime is 18894278033. The next prime is 18894278063. The reversal of 18894278052 is 25087249881.

18894278052 is a `hidden beast` number, since 18 + 89 + 427 + 80 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 18894278052.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 150243 + ... + 245685.

Almost surely, 2^18894278052 is an apocalyptic number.

18894278052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18894278052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27162598848).

18894278052 is an abundant number, since it is smaller than the sum of its proper divisors (35430919644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18894278052 is a wasteful number, since it uses less digits than its factorization.

18894278052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95519 (or 95508 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 18894278052 in words is "eighteen billion, eight hundred ninety-four million, two hundred seventy-eight thousand, fifty-two".