18871848 has 24 divisors (see below), whose sum is σ = 51111450. Its totient is φ = 6290592.

The previous prime is 18871841. The next prime is 18871859. The reversal of 18871848 is 84817881.

It can be written as a sum of positive squares in only one way, i.e., 16305444 + 2566404 = 4038^2 + 1602^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×18871848² = 712293293870208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18871841) 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, 130983 + ... + 131126.

Almost surely, 2^18871848 is an apocalyptic number.

18871848 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18871848 is an abundant number, since it is smaller than the sum of its proper divisors (32239602).

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

18871848 is a wasteful number, since it uses less digits than its factorization.

18871848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262121 (or 262114 counting only the distinct ones).

The product of its digits is 114688, while the sum is 45.

The square root of 18871848 is about 4344.1740296632. The cubic root of 18871848 is about 266.2388793874.

The spelling of 18871848 in words is "eighteen million, eight hundred seventy-one thousand, eight hundred forty-eight".