18882986240 has 144 divisors (see below), whose sum is σ = 46557259056. Its totient is φ = 7333478400.

The previous prime is 18882986233. The next prime is 18882986257. The reversal of 18882986240 is 4268928881.

It can be written as a sum of positive squares in 8 ways, for example, as 2027776 + 18880958464 = 1424^2 + 137408^2 .

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, 12646934 + ... + 12648426.

It is an arithmetic number, because the mean of its divisors is an integer number (323314299).

Almost surely, 2^18882986240 is an apocalyptic number.

18882986240 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 18882986240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23278629528).

18882986240 is an abundant number, since it is smaller than the sum of its proper divisors (27674272816).

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

18882986240 is a wasteful number, since it uses less digits than its factorization.

18882986240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796 (or 1782 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 56.

The spelling of 18882986240 in words is "eighteen billion, eight hundred eighty-two million, nine hundred eighty-six thousand, two hundred forty".