20246550978193 has 2 divisors, whose sum is σ = 20246550978194. Its totient is φ = 20246550978192.

The previous prime is 20246550978187. The next prime is 20246550978221. The reversal of 20246550978193 is 39187905564202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11039890052689 + 9206660925504 = 3322633^2 + 3034248^2 .

It is a cyclic number.

It is not a de Polignac number, because 20246550978193 - 2¹⁷ = 20246550847121 is a prime.

It is not a weakly prime, because it can be changed into another prime (20246550978163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10123275489096 + 10123275489097.

It is an arithmetic number, because the mean of its divisors is an integer number (10123275489097).

It is a 1-persistent number, because it is pandigital, but 2⋅20246550978193 = 40493101956386 is not.

Almost surely, 2^{20246550978193} is an apocalyptic number.

It is an amenable number.

20246550978193 is a deficient number, since it is larger than the sum of its proper divisors (1).

20246550978193 is an equidigital number, since it uses as much as digits as its factorization.

20246550978193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32659200, while the sum is 61.

The spelling of 20246550978193 in words is "twenty trillion, two hundred forty-six billion, five hundred fifty million, nine hundred seventy-eight thousand, one hundred ninety-three".