20720250753 has 16 divisors (see below), whose sum is σ = 28220368896. Its totient is φ = 13516932560.

The previous prime is 20720250751. The next prime is 20720250757. The reversal of 20720250753 is 35705202702.

It is a cyclic number.

It is not a de Polignac number, because 20720250753 - 2¹ = 20720250751 is a prime.

It is a super-3 number, since 3×20720250753³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20720250751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 914188 + ... + 936578.

It is an arithmetic number, because the mean of its divisors is an integer number (1763773056).

Almost surely, 2^20720250753 is an apocalyptic number.

It is an amenable number.

20720250753 is a deficient number, since it is larger than the sum of its proper divisors (7500118143).

20720250753 is a wasteful number, since it uses less digits than its factorization.

20720250753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29004.

The product of its (nonzero) digits is 29400, while the sum is 33.

The spelling of 20720250753 in words is "twenty billion, seven hundred twenty million, two hundred fifty thousand, seven hundred fifty-three".