20455264709 has 8 divisors (see below), whose sum is σ = 22531484352. Its totient is φ = 18415153440.

The previous prime is 20455264693. The next prime is 20455264721. The reversal of 20455264709 is 90746255402.

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

It is a cyclic number.

It is not a de Polignac number, because 20455264709 - 2⁴ = 20455264693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20455264709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455264769) 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, 9025904 + ... + 9028169.

It is an arithmetic number, because the mean of its divisors is an integer number (2816435544).

Almost surely, 2^20455264709 is an apocalyptic number.

It is an amenable number.

20455264709 is a deficient number, since it is larger than the sum of its proper divisors (2076219643).

20455264709 is a wasteful number, since it uses less digits than its factorization.

20455264709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18054187.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 20455264709 in words is "twenty billion, four hundred fifty-five million, two hundred sixty-four thousand, seven hundred nine".