20302175820 has 48 divisors (see below), whose sum is σ = 58232589408. Its totient is φ = 5281866240.

The previous prime is 20302175767. The next prime is 20302175843. The reversal of 20302175820 is 2857120302.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4123999 + ... + 4128918.

It is an arithmetic number, because the mean of its divisors is an integer number (1213178946).

Almost surely, 2^20302175820 is an apocalyptic number.

20302175820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20302175820 is an abundant number, since it is smaller than the sum of its proper divisors (37930413588).

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

20302175820 is a wasteful number, since it uses less digits than its factorization.

20302175820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8252970 (or 8252968 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The spelling of 20302175820 in words is "twenty billion, three hundred two million, one hundred seventy-five thousand, eight hundred twenty".