820426020 has 48 divisors (see below), whose sum is σ = 2299351488. Its totient is φ = 218574720.

The previous prime is 820425997. The next prime is 820426039. The reversal of 820426020 is 20624028.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64422 + ... + 76098.

It is an arithmetic number, because the mean of its divisors is an integer number (47903156).

Almost surely, 2^820426020 is an apocalyptic number.

It is an amenable number.

820426020 is an abundant number, since it is smaller than the sum of its proper divisors (1478925468).

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

820426020 is a wasteful number, since it uses less digits than its factorization.

820426020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12860 (or 12858 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 820426020 is about 28643.0797925083. The cubic root of 820426020 is about 936.1522279620.

The spelling of 820426020 in words is "eight hundred twenty million, four hundred twenty-six thousand, twenty".