20647308932753 has 2 divisors, whose sum is σ = 20647308932754. Its totient is φ = 20647308932752.

The previous prime is 20647308932693. The next prime is 20647308932791. The reversal of 20647308932753 is 35723980374602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16264951878289 + 4382357054464 = 4032983^2 + 2093408^2 .

It is a cyclic number.

It is not a de Polignac number, because 20647308932753 - 2²² = 20647304738449 is a prime.

It is a super-2 number, since 2×20647308932753² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20647308932692 and 20647308932701.

It is not a weakly prime, because it can be changed into another prime (20647308932053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10323654466376 + 10323654466377.

It is an arithmetic number, because the mean of its divisors is an integer number (10323654466377).

Almost surely, 2^{20647308932753} is an apocalyptic number.

It is an amenable number.

20647308932753 is a deficient number, since it is larger than the sum of its proper divisors (1).

20647308932753 is an equidigital number, since it uses as much as digits as its factorization.

20647308932753 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45722880, while the sum is 59.

The spelling of 20647308932753 in words is "twenty trillion, six hundred forty-seven billion, three hundred eight million, nine hundred thirty-two thousand, seven hundred fifty-three".