69820020 has 72 divisors (see below), whose sum is σ = 224255304. Its totient is φ = 17522688.

The previous prime is 69820013. The next prime is 69820021. The reversal of 69820020 is 2002896.

It can be written as a sum of positive squares in 4 ways, for example, as 38415204 + 31404816 = 6198^2 + 5604^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69820021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8349 + ... + 14468.

It is an arithmetic number, because the mean of its divisors is an integer number (3114657).

Almost surely, 2^69820020 is an apocalyptic number.

69820020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

69820020 is an abundant number, since it is smaller than the sum of its proper divisors (154435284).

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

69820020 is a wasteful number, since it uses less digits than its factorization.

69820020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22849 (or 22844 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 69820020 is about 8355.8374804684. The cubic root of 69820020 is about 411.7750130513.

The spelling of 69820020 in words is "sixty-nine million, eight hundred twenty thousand, twenty".