20641078 has 8 divisors (see below), whose sum is σ = 31001040. Its totient is φ = 10307400.

The previous prime is 20641073. The next prime is 20641099. The reversal of 20641078 is 87014602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20641073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4473 + ... + 7828.

It is an arithmetic number, because the mean of its divisors is an integer number (3875130).

Almost surely, 2^20641078 is an apocalyptic number.

20641078 is a deficient number, since it is larger than the sum of its proper divisors (10359962).

20641078 is a wasteful number, since it uses less digits than its factorization.

20641078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13142.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20641078 is about 4543.2453158508. The cubic root of 20641078 is about 274.3115694925.

The spelling of 20641078 in words is "twenty million, six hundred forty-one thousand, seventy-eight".