20078842 has 8 divisors (see below), whose sum is σ = 34420896. Its totient is φ = 8605212.

The previous prime is 20078813. The next prime is 20078843. The reversal of 20078842 is 24887002.

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

It is not an unprimeable number, because it can be changed into a prime (20078843) 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, 717088 + ... + 717115.

It is an arithmetic number, because the mean of its divisors is an integer number (4302612).

Almost surely, 2^20078842 is an apocalyptic number.

20078842 is a deficient number, since it is larger than the sum of its proper divisors (14342054).

20078842 is a wasteful number, since it uses less digits than its factorization.

20078842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434212.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 20078842 is about 4480.9420884452. The cubic root of 20078842 is about 271.7979775121.

The spelling of 20078842 in words is "twenty million, seventy-eight thousand, eight hundred forty-two".