20001034645 has 8 divisors (see below), whose sum is σ = 24100833240. Its totient is φ = 15934433280.

The previous prime is 20001034637. The next prime is 20001034649. The reversal of 20001034645 is 54643010002.

It can be written as a sum of positive squares in 4 ways, for example, as 1919929489 + 18081105156 = 43817^2 + 134466^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20001034645 - 2³ = 20001034637 is a prime.

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, 8297980 + ... + 8300389.

It is an arithmetic number, because the mean of its divisors is an integer number (3012604155).

Almost surely, 2^20001034645 is an apocalyptic number.

It is an amenable number.

20001034645 is a deficient number, since it is larger than the sum of its proper divisors (4099798595).

20001034645 is a wasteful number, since it uses less digits than its factorization.

20001034645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16598615.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20001034645 its reverse (54643010002), we get a palindrome (74644044647).

The spelling of 20001034645 in words is "twenty billion, one million, thirty-four thousand, six hundred forty-five".