820393355402 has 16 divisors (see below), whose sum is σ = 1245480334560. Its totient is φ = 405233751312.

The previous prime is 820393355401. The next prime is 820393355413. The reversal of 820393355402 is 204553393028.

It is not an unprimeable number, because it can be changed into a prime (820393355401) 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, 3414473 + ... + 3646835.

It is an arithmetic number, because the mean of its divisors is an integer number (77842520910).

Almost surely, 2^820393355402 is an apocalyptic number.

820393355402 is a deficient number, since it is larger than the sum of its proper divisors (425086979158).

820393355402 is a wasteful number, since it uses less digits than its factorization.

820393355402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253717.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 820393355402 in words is "eight hundred twenty billion, three hundred ninety-three million, three hundred fifty-five thousand, four hundred two".