18995240 has 64 divisors (see below), whose sum is σ = 48677760. Its totient is φ = 6603520.

The previous prime is 18995233. The next prime is 18995287. The reversal of 18995240 is 4259981.

It is a junction number, because it is equal to n+sod(n) for n = 18995194 and 18995203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9182 + ... + 11058.

It is an arithmetic number, because the mean of its divisors is an integer number (760590).

Almost surely, 2^18995240 is an apocalyptic number.

18995240 is a gapful number since it is divisible by the number (10) 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 18995240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24338880).

18995240 is an abundant number, since it is smaller than the sum of its proper divisors (29682520).

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

18995240 is a wasteful number, since it uses less digits than its factorization.

18995240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922 (or 1918 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 18995240 is about 4358.3528998923. The cubic root of 18995240 is about 266.8178795166.

The spelling of 18995240 in words is "eighteen million, nine hundred ninety-five thousand, two hundred forty".