64750020 has 48 divisors (see below), whose sum is σ = 185165568. Its totient is φ = 16898560.

The previous prime is 64750019. The next prime is 64750099. The reversal of 64750020 is 2005746.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8661 + ... + 14300.

It is an arithmetic number, because the mean of its divisors is an integer number (3857616).

Almost surely, 2^64750020 is an apocalyptic number.

64750020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64750020 is an abundant number, since it is smaller than the sum of its proper divisors (120415548).

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

64750020 is a wasteful number, since it uses less digits than its factorization.

64750020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23020 (or 23018 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 64750020 is about 8046.7397124550. The cubic root of 64750020 is about 401.5564772573.

Adding to 64750020 its reverse (2005746), we get a palindrome (66755766).

The spelling of 64750020 in words is "sixty-four million, seven hundred fifty thousand, twenty".