18884898 has 24 divisors (see below), whose sum is σ = 43071600. Its totient is φ = 5963544.

The previous prime is 18884891. The next prime is 18884927. The reversal of 18884898 is 89848881.

It is not an unprimeable number, because it can be changed into a prime (18884891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27268 + ... + 27951.

It is an arithmetic number, because the mean of its divisors is an integer number (1794650).

Almost surely, 2^18884898 is an apocalyptic number.

18884898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18884898 is an abundant number, since it is smaller than the sum of its proper divisors (24186702).

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

18884898 is a wasteful number, since it uses less digits than its factorization.

18884898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55246 (or 55243 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 54.

The square root of 18884898 is about 4345.6757817398. The cubic root of 18884898 is about 266.3002338597.

It can be divided in two parts, 1888 and 4898, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 18884898 in words is "eighteen million, eight hundred eighty-four thousand, eight hundred ninety-eight".