1109990020 has 12 divisors (see below), whose sum is σ = 2330979084. Its totient is φ = 443996000.

The previous prime is 1109990017. The next prime is 1109990081. The reversal of 1109990020 is 200999011.

It can be written as a sum of positive squares in 2 ways, for example, as 813048196 + 296941824 = 28514^2 + 17232^2 .

It is a super-3 number, since 3×1109990020³ (a number of 28 digits) contains 333 as substring.

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, 27749731 + ... + 27749770.

It is an arithmetic number, because the mean of its divisors is an integer number (194248257).

Almost surely, 2^1109990020 is an apocalyptic number.

1109990020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1109990020 is an abundant number, since it is smaller than the sum of its proper divisors (1220989064).

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

1109990020 is a wasteful number, since it uses less digits than its factorization.

1109990020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55499510 (or 55499508 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 1109990020 is about 33316.5127226725. The cubic root of 1109990020 is about 1035.3957023520.

The spelling of 1109990020 in words is "one billion, one hundred nine million, nine hundred ninety thousand, twenty".