20001034644 has 24 divisors (see below), whose sum is σ = 46796254848. Its totient is φ = 6648843840.

The previous prime is 20001034637. The next prime is 20001034649. The reversal of 20001034644 is 44643010002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001034649) 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, 2266377 + ... + 2275184.

It is an arithmetic number, because the mean of its divisors is an integer number (1949843952).

Almost surely, 2^20001034644 is an apocalyptic number.

It is an amenable number.

20001034644 is an abundant number, since it is smaller than the sum of its proper divisors (26795220204).

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

20001034644 is a wasteful number, since it uses less digits than its factorization.

20001034644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4541935 (or 4541933 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20001034644 its reverse (44643010002), we get a palindrome (64644044646).

The spelling of 20001034644 in words is "twenty billion, one million, thirty-four thousand, six hundred forty-four".