64100020 has 24 divisors (see below), whose sum is σ = 136819368. Its totient is φ = 25219200.

The previous prime is 64099999. The next prime is 64100083. The reversal of 64100020 is 2000146.

64100020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8328996 + 55771024 = 2886^2 + 7468^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 25051 + ... + 27490.

It is an arithmetic number, because the mean of its divisors is an integer number (5700807).

Almost surely, 2^64100020 is an apocalyptic number.

It is an amenable number.

64100020 is an abundant number, since it is smaller than the sum of its proper divisors (72719348).

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

64100020 is a wasteful number, since it uses less digits than its factorization.

64100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52611 (or 52609 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 64100020 is about 8006.2488095237. The cubic root of 64100020 is about 400.2082665438.

Adding to 64100020 its reverse (2000146), we get a palindrome (66100166).

The spelling of 64100020 in words is "sixty-four million, one hundred thousand, twenty".