20651173513753 has 8 divisors (see below), whose sum is σ = 20656894217960. Its totient is φ = 20645453560320.

The previous prime is 20651173513723. The next prime is 20651173513757. The reversal of 20651173513753 is 35731537115602.

It can be written as a sum of positive squares in 4 ways, for example, as 1067477443344 + 19583696070409 = 1033188^2 + 4425347^2 .

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 20651173513753 - 2⁵ = 20651173513721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20651173513697 and 20651173513706.

It is not an unprimeable number, because it can be changed into a prime (20651173513757) 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, 57241813 + ... + 57601453.

It is an arithmetic number, because the mean of its divisors is an integer number (2582111777245).

Almost surely, 2^{20651173513753} is an apocalyptic number.

It is an amenable number.

20651173513753 is a deficient number, since it is larger than the sum of its proper divisors (5720704207).

20651173513753 is a wasteful number, since it uses less digits than its factorization.

20651173513753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375387.

The product of its (nonzero) digits is 1984500, while the sum is 49.

The spelling of 20651173513753 in words is "twenty trillion, six hundred fifty-one billion, one hundred seventy-three million, five hundred thirteen thousand, seven hundred fifty-three".