1011994020 has 192 divisors, whose sum is σ = 3479293440. Its totient is φ = 242896896.

The previous prime is 1011994013. The next prime is 1011994033. The reversal of 1011994020 is 204991101.

1011994020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 208744 + ... + 213536.

It is an arithmetic number, because the mean of its divisors is an integer number (18121320).

Almost surely, 2^1011994020 is an apocalyptic number.

1011994020 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 1011994020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1739646720).

1011994020 is an abundant number, since it is smaller than the sum of its proper divisors (2467299420).

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

1011994020 is a wasteful number, since it uses less digits than its factorization.

1011994020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4851 (or 4843 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1011994020 is about 31811.8534511902. The cubic root of 1011994020 is about 1003.9821282724.

The spelling of 1011994020 in words is "one billion, eleven million, nine hundred ninety-four thousand, twenty".