20764008788293 has 2 divisors, whose sum is σ = 20764008788294. Its totient is φ = 20764008788292.

The previous prime is 20764008788291. The next prime is 20764008788417. The reversal of 20764008788293 is 39288780046702.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19934421180804 + 829587607489 = 4464798^2 + 910817^2 .

It is a cyclic number.

It is not a de Polignac number, because 20764008788293 - 2¹ = 20764008788291 is a prime.

It is a super-2 number, since 2×20764008788293² (a number of 27 digits) contains 22 as substring.

Together with 20764008788291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20764008788291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10382004394146 + 10382004394147.

It is an arithmetic number, because the mean of its divisors is an integer number (10382004394147).

Almost surely, 2^{20764008788293} is an apocalyptic number.

It is an amenable number.

20764008788293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20764008788293 is an equidigital number, since it uses as much as digits as its factorization.

20764008788293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65028096, while the sum is 64.

The spelling of 20764008788293 in words is "twenty trillion, seven hundred sixty-four billion, eight million, seven hundred eighty-eight thousand, two hundred ninety-three".