820431432356 has 48 divisors (see below), whose sum is σ = 1493045084160. Its totient is φ = 394049830560.

The previous prime is 820431432329. The next prime is 820431432361. The reversal of 820431432356 is 653234134028.

It is a happy number.

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, 14861501 + ... + 14916603.

It is an arithmetic number, because the mean of its divisors is an integer number (31105105920).

Almost surely, 2^820431432356 is an apocalyptic number.

It is an amenable number.

820431432356 is a deficient number, since it is larger than the sum of its proper divisors (672613651804).

820431432356 is a wasteful number, since it uses less digits than its factorization.

820431432356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56024 (or 56022 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 820431432356 in words is "eight hundred twenty billion, four hundred thirty-one million, four hundred thirty-two thousand, three hundred fifty-six".