1200020994 has 48 divisors (see below), whose sum is σ = 2702673792. Its totient is φ = 399068208.

The previous prime is 1200020869. The next prime is 1200020999. The reversal of 1200020994 is 4990200021.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1200020999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222352 + ... + 227684.

It is an arithmetic number, because the mean of its divisors is an integer number (56305704).

Almost surely, 2^1200020994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200020994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1351336896).

1200020994 is an abundant number, since it is smaller than the sum of its proper divisors (1502652798).

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

1200020994 is an equidigital number, since it uses as much as digits as its factorization.

1200020994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5813 (or 5801 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1200020994 is about 34641.3191723410. The cubic root of 1200020994 is about 1062.6647662170.

The spelling of 1200020994 in words is "one billion, two hundred million, twenty thousand, nine hundred ninety-four".