20156834684823 has 8 divisors (see below), whose sum is σ = 27215979321600. Its totient is φ = 13267789918968.

The previous prime is 20156834684773. The next prime is 20156834684837. The reversal of 20156834684823 is 32848643865102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20156834684823 - 2¹⁶ = 20156834619287 is a prime.

It is a super-2 number, since 2×20156834684823² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20156834684923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42524967453 + ... + 42524967926.

It is an arithmetic number, because the mean of its divisors is an integer number (3401997415200).

Almost surely, 2^{20156834684823} is an apocalyptic number.

20156834684823 is a deficient number, since it is larger than the sum of its proper divisors (7059144636777).

20156834684823 is an equidigital number, since it uses as much as digits as its factorization.

20156834684823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85049935461.

The product of its (nonzero) digits is 53084160, while the sum is 60.

The spelling of 20156834684823 in words is "twenty trillion, one hundred fifty-six billion, eight hundred thirty-four million, six hundred eighty-four thousand, eight hundred twenty-three".