63921318 has 32 divisors (see below), whose sum is σ = 132544512. Its totient is φ = 20529600.

The previous prime is 63921293. The next prime is 63921329. The reversal of 63921318 is 81312936.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51655 + ... + 52877.

It is an arithmetic number, because the mean of its divisors is an integer number (4142016).

Almost surely, 2^63921318 is an apocalyptic number.

63921318 is an abundant number, since it is smaller than the sum of its proper divisors (68623194).

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

63921318 is a wasteful number, since it uses less digits than its factorization.

63921318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540.

The product of its digits is 7776, while the sum is 33.

The square root of 63921318 is about 7995.0808626305. The cubic root of 63921318 is about 399.8360119456.

The spelling of 63921318 in words is "sixty-three million, nine hundred twenty-one thousand, three hundred eighteen".