20001001032 has 64 divisors (see below), whose sum is σ = 55677585600. Its totient is φ = 6652690560.

The previous prime is 20001001021. The next prime is 20001001049. The reversal of 20001001032 is 23010010002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1732 + ... + 200012.

It is an arithmetic number, because the mean of its divisors is an integer number (869962275).

Almost surely, 2^20001001032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001001032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27838792800).

20001001032 is an abundant number, since it is smaller than the sum of its proper divisors (35676584568).

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

20001001032 is a wasteful number, since it uses less digits than its factorization.

20001001032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198763 (or 198753 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 20001001032 its reverse (23010010002), we get a palindrome (43011011034).

The spelling of 20001001032 in words is "twenty billion, one million, one thousand, thirty-two".