820020132 has 24 divisors (see below), whose sum is σ = 2125978400. Its totient is φ = 273340008.

The previous prime is 820020119. The next prime is 820020161. The reversal of 820020132 is 231020028.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3796282 + ... + 3796497.

Almost surely, 2^820020132 is an apocalyptic number.

It is an amenable number.

820020132 is an abundant number, since it is smaller than the sum of its proper divisors (1305958268).

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

820020132 is a wasteful number, since it uses less digits than its factorization.

820020132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7592792 (or 7592784 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 820020132 is about 28635.9936443630. The cubic root of 820020132 is about 935.9978221514.

The spelling of 820020132 in words is "eight hundred twenty million, twenty thousand, one hundred thirty-two".