20780315053 has 4 divisors (see below), whose sum is σ = 20794878720. Its totient is φ = 20765751388.

The previous prime is 20780315047. The next prime is 20780315089. The reversal of 20780315053 is 35051308702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20780315053 - 2⁵ = 20780315021 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 (20780315753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7279693 + ... + 7282546.

It is an arithmetic number, because the mean of its divisors is an integer number (5198719680).

Almost surely, 2^20780315053 is an apocalyptic number.

It is an amenable number.

20780315053 is a deficient number, since it is larger than the sum of its proper divisors (14563667).

20780315053 is a wasteful number, since it uses less digits than its factorization.

20780315053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14563666.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 20780315053 in words is "twenty billion, seven hundred eighty million, three hundred fifteen thousand, fifty-three".