20018002001 has 16 divisors (see below), whose sum is σ = 20448411648. Its totient is φ = 19592571600.

The previous prime is 20018001977. The next prime is 20018002021. The reversal of 20018002001 is 10020081002.

It is a cyclic number.

It is not a de Polignac number, because 20018002001 - 2⁶ = 20018001937 is a prime.

It is a super-2 number, since 2×20018002001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20018002021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13607696 + ... + 13609166.

It is an arithmetic number, because the mean of its divisors is an integer number (1278025728).

Almost surely, 2^20018002001 is an apocalyptic number.

It is an amenable number.

20018002001 is a deficient number, since it is larger than the sum of its proper divisors (430409647).

20018002001 is a wasteful number, since it uses less digits than its factorization.

20018002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20018002001 its reverse (10020081002), we get a palindrome (30038083003).

The spelling of 20018002001 in words is "twenty billion, eighteen million, two thousand, one".