20619857643263 has 8 divisors (see below), whose sum is σ = 20679609094368. Its totient is φ = 20560192353504.

The previous prime is 20619857643247. The next prime is 20619857643271. The reversal of 20619857643263 is 36234675891602.

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 20619857643263 - 2⁴ = 20619857643247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20619857643196 and 20619857643205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20619857649263) 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, 21060995 + ... + 22018292.

It is an arithmetic number, because the mean of its divisors is an integer number (2584951136796).

It is a 1-persistent number, because it is pandigital, but 2⋅20619857643263 = 41239715286526 is not.

Almost surely, 2^{20619857643263} is an apocalyptic number.

20619857643263 is a deficient number, since it is larger than the sum of its proper divisors (59751451105).

20619857643263 is an equidigital number, since it uses as much as digits as its factorization.

20619857643263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43080673.

The product of its (nonzero) digits is 78382080, while the sum is 62.

The spelling of 20619857643263 in words is "twenty trillion, six hundred nineteen billion, eight hundred fifty-seven million, six hundred forty-three thousand, two hundred sixty-three".