20450078 has 8 divisors (see below), whose sum is σ = 33463800. Its totient is φ = 9295480.

The previous prime is 20450071. The next prime is 20450083. The reversal of 20450078 is 87005402.

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 (20450071) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 464753 + ... + 464796.

It is an arithmetic number, because the mean of its divisors is an integer number (4182975).

Almost surely, 2^20450078 is an apocalyptic number.

20450078 is a deficient number, since it is larger than the sum of its proper divisors (13013722).

20450078 is a wasteful number, since it uses less digits than its factorization.

20450078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929562.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 20450078 is about 4522.1762460125. The cubic root of 20450078 is about 273.4628419919.

The spelling of 20450078 in words is "twenty million, four hundred fifty thousand, seventy-eight".