820324245047 has 4 divisors (see below), whose sum is σ = 820329442296. Its totient is φ = 820319047800.

The previous prime is 820324245043. The next prime is 820324245067. The reversal of 820324245047 is 740542423028.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 820324245047 - 2² = 820324245043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 820324244995 and 820324245013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820324245043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2354204 + ... + 2680097.

It is an arithmetic number, because the mean of its divisors is an integer number (205082360574).

Almost surely, 2^820324245047 is an apocalyptic number.

820324245047 is a deficient number, since it is larger than the sum of its proper divisors (5197249).

820324245047 is a wasteful number, since it uses less digits than its factorization.

820324245047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197248.

The product of its (nonzero) digits is 430080, while the sum is 41.

The spelling of 820324245047 in words is "eight hundred twenty billion, three hundred twenty-four million, two hundred forty-five thousand, forty-seven".