820713384514 has 4 divisors (see below), whose sum is σ = 1231070076774. Its totient is φ = 410356692256.

The previous prime is 820713384511. The next prime is 820713384523. The reversal of 820713384514 is 415483317028.

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

It can be written as a sum of positive squares in only one way, i.e., 820504437489 + 208947025 = 905817^2 + 14455^2 .

It is not an unprimeable number, because it can be changed into a prime (820713384511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205178346127 + ... + 205178346130.

Almost surely, 2^820713384514 is an apocalyptic number.

820713384514 is a deficient number, since it is larger than the sum of its proper divisors (410356692260).

820713384514 is a wasteful number, since it uses less digits than its factorization.

820713384514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410356692259.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 820713384514 in words is "eight hundred twenty billion, seven hundred thirteen million, three hundred eighty-four thousand, five hundred fourteen".