2001019998 has 16 divisors (see below), whose sum is σ = 4212673920. Its totient is φ = 631901016.

The previous prime is 2001019997. The next prime is 2001020029. The reversal of 2001019998 is 8999101002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001019997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8776290 + ... + 8776517.

It is an arithmetic number, because the mean of its divisors is an integer number (263292120).

Almost surely, 2^2001019998 is an apocalyptic number.

2001019998 is an abundant number, since it is smaller than the sum of its proper divisors (2211653922).

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

2001019998 is a wasteful number, since it uses less digits than its factorization.

2001019998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17552831.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 2001019998 is about 44732.7620206935. The cubic root of 2001019998 is about 1260.1351996521.

The spelling of 2001019998 in words is "two billion, one million, nineteen thousand, nine hundred ninety-eight".