820820352503 has 8 divisors (see below), whose sum is σ = 823599416640. Its totient is φ = 818044719840.

The previous prime is 820820352467. The next prime is 820820352509. The reversal of 820820352503 is 305253028028.

It is a happy number.

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 820820352503 - 2¹⁶ = 820820286967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820820352509) 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, 378200 + ... + 1335917.

It is an arithmetic number, because the mean of its divisors is an integer number (102949927080).

Almost surely, 2^820820352503 is an apocalyptic number.

820820352503 is a deficient number, since it is larger than the sum of its proper divisors (2779064137).

820820352503 is a wasteful number, since it uses less digits than its factorization.

820820352503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715737.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 820820352503 in words is "eight hundred twenty billion, eight hundred twenty million, three hundred fifty-two thousand, five hundred three".