1001020194 has 80 divisors (see below), whose sum is σ = 2365203456. Its totient is φ = 315964800.

The previous prime is 1001020171. The next prime is 1001020213. The reversal of 1001020194 is 4910201001.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 233914 + ... + 238154.

Almost surely, 2^1001020194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1001020194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1182601728).

1001020194 is an abundant number, since it is smaller than the sum of its proper divisors (1364183262).

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

1001020194 is a wasteful number, since it uses less digits than its factorization.

1001020194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4333 (or 4324 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1001020194 is about 31638.9031731506. The cubic root of 1001020194 is about 1000.3399490882.

Adding to 1001020194 its reverse (4910201001), we get a palindrome (5911221195).

The spelling of 1001020194 in words is "one billion, one million, twenty thousand, one hundred ninety-four".