20089751564873 has 2 divisors, whose sum is σ = 20089751564874. Its totient is φ = 20089751564872.

The previous prime is 20089751564789. The next prime is 20089751564881. The reversal of 20089751564873 is 37846515798002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19426655674624 + 663095890249 = 4407568^2 + 814307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20089751564873 is a prime.

It is a super-2 number, since 2×20089751564873² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20089751564893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10044875782436 + 10044875782437.

It is an arithmetic number, because the mean of its divisors is an integer number (10044875782437).

It is a 1-persistent number, because it is pandigital, but 2⋅20089751564873 = 40179503129746 is not.

Almost surely, 2^{20089751564873} is an apocalyptic number.

It is an amenable number.

20089751564873 is a deficient number, since it is larger than the sum of its proper divisors (1).

20089751564873 is an equidigital number, since it uses as much as digits as its factorization.

20089751564873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 101606400, while the sum is 65.

The spelling of 20089751564873 in words is "twenty trillion, eighty-nine billion, seven hundred fifty-one million, five hundred sixty-four thousand, eight hundred seventy-three".