820670365380 has 48 divisors (see below), whose sum is σ = 2298124382400. Its totient is φ = 218821872768.

The previous prime is 820670365379. The next prime is 820670365381. The reversal of 820670365380 is 83563076028.

It is an interprime number because it is at equal distance from previous prime (820670365379) and next prime (820670365381).

It is a super-2 number, since 2×820670365380² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (820670365381) 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, 170574 + ... + 1292453.

It is an arithmetic number, because the mean of its divisors is an integer number (47877591300).

Almost surely, 2^820670365380 is an apocalyptic number.

It is an amenable number.

820670365380 is an abundant number, since it is smaller than the sum of its proper divisors (1477454017020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

820670365380 is a wasteful number, since it uses less digits than its factorization.

820670365380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472388 (or 1472386 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 820670365380 in words is "eight hundred twenty billion, six hundred seventy million, three hundred sixty-five thousand, three hundred eighty".