20356345320 has 32 divisors (see below), whose sum is σ = 61069036320. Its totient is φ = 5428358720.

The previous prime is 20356345301. The next prime is 20356345333. The reversal of 20356345320 is 2354365302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84817986 + ... + 84818225.

It is an arithmetic number, because the mean of its divisors is an integer number (1908407385).

Almost surely, 2^20356345320 is an apocalyptic number.

20356345320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20356345320 is an abundant number, since it is smaller than the sum of its proper divisors (40712691000).

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

20356345320 is a wasteful number, since it uses less digits than its factorization.

20356345320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169636225 (or 169636221 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 33.

The spelling of 20356345320 in words is "twenty billion, three hundred fifty-six million, three hundred forty-five thousand, three hundred twenty".