1118020220 has 12 divisors (see below), whose sum is σ = 2347842504. Its totient is φ = 447208080.

The previous prime is 1118020199. The next prime is 1118020291. The reversal of 1118020220 is 220208111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27950486 + ... + 27950525.

It is an arithmetic number, because the mean of its divisors is an integer number (195653542).

Almost surely, 2^1118020220 is an apocalyptic number.

1118020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1118020220 is an abundant number, since it is smaller than the sum of its proper divisors (1229822284).

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

1118020220 is a wasteful number, since it uses less digits than its factorization.

1118020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55901020 (or 55901018 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1118020220 is about 33436.8093573535. The cubic root of 1118020220 is about 1037.8865549470.

Adding to 1118020220 its reverse (220208111), we get a palindrome (1338228331).

The spelling of 1118020220 in words is "one billion, one hundred eighteen million, twenty thousand, two hundred twenty".