20005101760421 has 8 divisors (see below), whose sum is σ = 20141559098520. Its totient is φ = 19868982607872.

The previous prime is 20005101760367. The next prime is 20005101760429. The reversal of 20005101760421 is 12406710150002.

It can be written as a sum of positive squares in 4 ways, for example, as 319774416196 + 19685327344225 = 565486^2 + 4436815^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20005101760421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005101760429) 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, 84427676 + ... + 84664293.

It is an arithmetic number, because the mean of its divisors is an integer number (2517694887315).

Almost surely, 2^{20005101760421} is an apocalyptic number.

It is an amenable number.

20005101760421 is a deficient number, since it is larger than the sum of its proper divisors (136457338099).

20005101760421 is a wasteful number, since it uses less digits than its factorization.

20005101760421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169092775.

The product of its (nonzero) digits is 3360, while the sum is 29.

The spelling of 20005101760421 in words is "twenty trillion, five billion, one hundred one million, seven hundred sixty thousand, four hundred twenty-one".