820312930477 has 16 divisors (see below), whose sum is σ = 840500559360. Its totient is φ = 800429338800.

The previous prime is 820312930471. The next prime is 820312930483. The reversal of 820312930477 is 774039213028.

It is an interprime number because it is at equal distance from previous prime (820312930471) and next prime (820312930483).

It is a cyclic number.

It is not a de Polignac number, because 820312930477 - 2²³ = 820304541869 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 (820312930471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2115424 + ... + 2472982.

It is an arithmetic number, because the mean of its divisors is an integer number (52531284960).

Almost surely, 2^820312930477 is an apocalyptic number.

It is an amenable number.

820312930477 is a deficient number, since it is larger than the sum of its proper divisors (20187628883).

820312930477 is a wasteful number, since it uses less digits than its factorization.

820312930477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357984.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 820312930477 in words is "eight hundred twenty billion, three hundred twelve million, nine hundred thirty thousand, four hundred seventy-seven".