1618248020 has 24 divisors (see below), whose sum is σ = 3598222824. Its totient is φ = 609222656.

The previous prime is 1618248011. The next prime is 1618248043. The reversal of 1618248020 is 208428161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 159466384 + 1458781636 = 12628^2 + 38194^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2379437 + ... + 2380116.

It is an arithmetic number, because the mean of its divisors is an integer number (149925951).

Almost surely, 2^1618248020 is an apocalyptic number.

1618248020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1618248020 is an abundant number, since it is smaller than the sum of its proper divisors (1979974804).

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

1618248020 is a wasteful number, since it uses less digits than its factorization.

1618248020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4759579 (or 4759577 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 1618248020 is about 40227.4535609700. The cubic root of 1618248020 is about 1174.0367587820.

The spelling of 1618248020 in words is "one billion, six hundred eighteen million, two hundred forty-eight thousand, twenty".