820428882403 has 4 divisors (see below), whose sum is σ = 883538796448. Its totient is φ = 757318968360.

The previous prime is 820428882269. The next prime is 820428882409. The reversal of 820428882403 is 304288824028.

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 820428882403 - 2³⁷ = 682989928931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820428882409) 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, 31554957003 + ... + 31554957028.

It is an arithmetic number, because the mean of its divisors is an integer number (220884699112).

Almost surely, 2^820428882403 is an apocalyptic number.

820428882403 is a deficient number, since it is larger than the sum of its proper divisors (63109914045).

820428882403 is a wasteful number, since it uses less digits than its factorization.

820428882403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63109914044.

The product of its (nonzero) digits is 1572864, while the sum is 49.

The spelling of 820428882403 in words is "eight hundred twenty billion, four hundred twenty-eight million, eight hundred eighty-two thousand, four hundred three".