64180020 has 24 divisors (see below), whose sum is σ = 179704224. Its totient is φ = 17114656.

The previous prime is 64180007. The next prime is 64180031. The reversal of 64180020 is 2008146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534774 + ... + 534893.

It is an arithmetic number, because the mean of its divisors is an integer number (7487676).

Almost surely, 2^64180020 is an apocalyptic number.

64180020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64180020 is an abundant number, since it is smaller than the sum of its proper divisors (115524204).

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

64180020 is a wasteful number, since it uses less digits than its factorization.

64180020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069679 (or 1069677 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 64180020 is about 8011.2433491937. The cubic root of 64180020 is about 400.3746905745.

Adding to 64180020 its reverse (2008146), we get a palindrome (66188166).

The spelling of 64180020 in words is "sixty-four million, one hundred eighty thousand, twenty".