63381920 has 48 divisors (see below), whose sum is σ = 171134208. Its totient is φ = 21730560.

The previous prime is 63381911. The next prime is 63381943. The reversal of 63381920 is 2918336.

It is a Harshad number since it is a multiple of its sum of digits (32).

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 7 ways as a sum of consecutive naturals, for example, 27176 + ... + 29415.

It is an arithmetic number, because the mean of its divisors is an integer number (3565296).

Almost surely, 2^63381920 is an apocalyptic number.

It is an amenable number.

63381920 is an abundant number, since it is smaller than the sum of its proper divisors (107752288).

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

63381920 is a wasteful number, since it uses less digits than its factorization.

63381920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56613 (or 56605 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 63381920 is about 7961.2762795924. The cubic root of 63381920 is about 398.7081657353.

The spelling of 63381920 in words is "sixty-three million, three hundred eighty-one thousand, nine hundred twenty".