64021994 has 8 divisors (see below), whose sum is σ = 96231648. Its totient is φ = 31944780.

The previous prime is 64021961. The next prime is 64022003. The reversal of 64021994 is 49912046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31892 + ... + 33839.

It is an arithmetic number, because the mean of its divisors is an integer number (12028956).

Almost surely, 2^64021994 is an apocalyptic number.

64021994 is a deficient number, since it is larger than the sum of its proper divisors (32209654).

64021994 is a wasteful number, since it uses less digits than its factorization.

64021994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66220.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 64021994 is about 8001.3745069207. The cubic root of 64021994 is about 400.0458155855.

The spelling of 64021994 in words is "sixty-four million, twenty-one thousand, nine hundred ninety-four".