20039678 has 4 divisors (see below), whose sum is σ = 30059520. Its totient is φ = 10019838.

The previous prime is 20039641. The next prime is 20039687. The reversal of 20039678 is 87693002.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5009918 + ... + 5009921.

It is an arithmetic number, because the mean of its divisors is an integer number (7514880).

Almost surely, 2^20039678 is an apocalyptic number.

20039678 is a deficient number, since it is larger than the sum of its proper divisors (10019842).

20039678 is a wasteful number, since it uses less digits than its factorization.

20039678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10019841.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 20039678 is about 4476.5698922278. The cubic root of 20039678 is about 271.6211475209.

The spelling of 20039678 in words is "twenty million, thirty-nine thousand, six hundred seventy-eight".